diff --git a/src/application/abstractions/repositories/i_user_repository.py b/src/application/abstractions/repositories/i_user_repository.py
index 0d922d6..43eb3d4 100644
--- a/src/application/abstractions/repositories/i_user_repository.py
+++ b/src/application/abstractions/repositories/i_user_repository.py
@@ -39,5 +39,5 @@ class IUserRepository(ABC):
         raise NotImplementedError
 
     @abstractmethod
-    async def set_avatar_link(self, user_id: str, avatar_link: str) -> UserEntity:
+    async def set_avatar_link(self, user_id: str, avatar_link: str | None) -> UserEntity:
         raise NotImplementedError
diff --git a/src/application/commands/__init__.py b/src/application/commands/__init__.py
index 8831d29..0b859e1 100644
--- a/src/application/commands/__init__.py
+++ b/src/application/commands/__init__.py
@@ -1,6 +1,7 @@
 from src.application.commands.get_me import GetMeCommand
 from src.application.commands.set_phone import SetPhoneCommand
 from src.application.commands.set_avatar import SetAvatarCommand
+from src.application.commands.delete_avatar import DeleteAvatarCommand
 from src.application.commands.set_encrypted_mnemonic_start import SetEncryptedMnemonicStartCommand
 from src.application.commands.set_encrypted_mnemonic_complete import SetEncryptedMnemonicCompleteCommand
 from src.application.commands.update_bank_details_start import UpdateBankDetailsStartCommand
diff --git a/src/application/commands/delete_avatar.py b/src/application/commands/delete_avatar.py
new file mode 100644
index 0000000..916e641
--- /dev/null
+++ b/src/application/commands/delete_avatar.py
@@ -0,0 +1,37 @@
+from __future__ import annotations
+
+from botocore.exceptions import ClientError
+
+from src.application.abstractions import IUnitOfWork
+from src.application.contracts import ICache, ILogger, IS3
+from src.application.domain.entities import UserEntity
+from src.infrastructure.database.decorators import transactional
+
+
+class DeleteAvatarCommand:
+    def __init__(self, unit_of_work: IUnitOfWork, logger: ILogger, cache: ICache, s3: IS3):
+        self._unit_of_work = unit_of_work
+        self._logger = logger
+        self._cache = cache
+        self._s3 = s3
+
+    async def __call__(self, user_id: str) -> UserEntity:
+        prior = await self._unit_of_work.user_repository.get_user_by_id(user_id)
+        link = prior.avatar_link
+        if link:
+            key = self._s3.object_key_from_public_url(link)
+            if key:
+                try:
+                    await self._s3.delete_object(key=key)
+                except ClientError as exc:
+                    code = exc.response.get('Error', {}).get('Code', '')
+                    if code not in ('NoSuchKey', '404'):
+                        self._logger.warning(f'S3 delete avatar failed user_id={user_id} code={code}: {exc}')
+        user = await self._clear_avatar_link(user_id)
+        await self._cache.set_user(user_id, user)
+        self._logger.info(f'Avatar removed user_id={user_id}')
+        return user
+
+    @transactional
+    async def _clear_avatar_link(self, user_id: str) -> UserEntity:
+        return await self._unit_of_work.user_repository.set_avatar_link(user_id, None)
diff --git a/src/application/commands/set_avatar.py b/src/application/commands/set_avatar.py
index 43ce3e3..87c97be 100644
--- a/src/application/commands/set_avatar.py
+++ b/src/application/commands/set_avatar.py
@@ -6,6 +6,7 @@ from PIL import UnidentifiedImageError
 from ulid import ULID
 
 from botocore.exceptions import ClientError
+
 from src.application.abstractions import IUnitOfWork
 from src.application.contracts import ICache, ILogger, IS3
 from src.application.domain.entities import UserEntity
@@ -23,6 +24,8 @@ class SetAvatarCommand:
         self._s3 = s3
 
     async def __call__(self, user_id: str, image_bytes: bytes) -> tuple[UserEntity, int]:
+        prior = await self._unit_of_work.user_repository.get_user_by_id(user_id)
+        old_link = prior.avatar_link
         try:
             webp_bytes = image_bytes_to_webp(image_bytes)
         except UnidentifiedImageError as exc:
@@ -46,6 +49,17 @@ class SetAvatarCommand:
 
         user = await self._save_avatar_link(user_id, url)
         await self._cache.set_user(user_id, user)
+
+        if old_link:
+            old_key = self._s3.object_key_from_public_url(old_link)
+            if old_key and old_key != object_key:
+                try:
+                    await self._s3.delete_object(key=old_key)
+                except ClientError as exc:
+                    code = exc.response.get('Error', {}).get('Code', '')
+                    if code not in ('NoSuchKey', '404'):
+                        self._logger.warning(f'S3 delete old avatar failed user_id={user_id} code={code}: {exc}')
+
         self._logger.info(f'Avatar set for user_id={user_id} key={object_key}')
         return user, len(webp_bytes)
 
diff --git a/src/application/contracts/i_s3.py b/src/application/contracts/i_s3.py
index eeaaf2a..8164896 100644
--- a/src/application/contracts/i_s3.py
+++ b/src/application/contracts/i_s3.py
@@ -7,3 +7,11 @@ from typing import Protocol, runtime_checkable
 class IS3(Protocol):
     async def upload_bytes(self, *, key: str, body: bytes, content_type: str) -> str:
         ...
+
+
+    async def delete_object(self, *, key: str) -> None:
+        ...
+
+
+    def object_key_from_public_url(self, url: str) -> str | None:
+        ...
diff --git a/src/infrastructure/database/repositories/user_repository.py b/src/infrastructure/database/repositories/user_repository.py
index 369666d..cbcbdb0 100644
--- a/src/infrastructure/database/repositories/user_repository.py
+++ b/src/infrastructure/database/repositories/user_repository.py
@@ -89,7 +89,7 @@ class UserRepository(IUserRepository):
     async def set_encrypted_mnemonic(self, user_id: str, encrypted_mnemonic: str) -> UserEntity:
         return await self._update_field(user_id, encrypted_mnemonic=encrypted_mnemonic)
 
-    async def set_avatar_link(self, user_id: str, avatar_link: str) -> UserEntity:
+    async def set_avatar_link(self, user_id: str, avatar_link: str | None) -> UserEntity:
         return await self._update_field(user_id, avatar_link=avatar_link)
 
     async def get_password_hash(self, user_id: str) -> str:
diff --git a/src/infrastructure/storage/s3_service.py b/src/infrastructure/storage/s3_service.py
index 0dd0a56..62780a1 100644
--- a/src/infrastructure/storage/s3_service.py
+++ b/src/infrastructure/storage/s3_service.py
@@ -24,6 +24,52 @@ class S3Service:
         self._endpoint_url = endpoint_url.strip().rstrip('/') if endpoint_url and endpoint_url.strip() else None
         self._use_reg_ru_website_public_host = use_reg_ru_website_public_host
 
+    @staticmethod
+    def _url_prefix_variants(prefix: str) -> list[str]:
+        p = prefix.rstrip('/') + '/'
+        out = [p]
+        if p.startswith('https://'):
+            out.append('http://' + p[8:])
+        elif p.startswith('http://'):
+            out.append('https://' + p[7:])
+        return out
+
+    def _public_url_prefixes(self) -> list[str]:
+        acc: list[str] = []
+        pb = self._public_base_url
+        if pb:
+            acc.extend(self._url_prefix_variants(pb))
+        ep = self._endpoint_url
+        if ep:
+            base = f'{ep.rstrip("/")}/{self._bucket}'
+            acc.extend(self._url_prefix_variants(base))
+        if ep and self._use_reg_ru_website_public_host and 's3.regru.cloud' in ep.lower():
+            wh = f'https://{self._bucket}.website.regru.cloud'
+            acc.extend(self._url_prefix_variants(wh))
+        if not ep:
+            if self._region == 'us-east-1':
+                h = f'https://{self._bucket}.s3.amazonaws.com'
+            else:
+                h = f'https://{self._bucket}.s3.{self._region}.amazonaws.com'
+            acc.extend(self._url_prefix_variants(h))
+        seen: set[str] = set()
+        uniq: list[str] = []
+        for x in sorted(acc, key=len, reverse=True):
+            if x not in seen:
+                seen.add(x)
+                uniq.append(x)
+        return uniq
+
+    def object_key_from_public_url(self, url: str) -> str | None:
+        u = (url or '').strip()
+        if not u:
+            return None
+        for p in self._public_url_prefixes():
+            if u.startswith(p):
+                k = u[len(p):].split('?', 1)[0].split('#', 1)[0]
+                return k if k else None
+        return None
+
     def _object_url(self, key: str) -> str:
         if self._public_base_url:
             return f'{self._public_base_url}/{key}'
@@ -62,3 +108,18 @@ class S3Service:
                 ContentType=content_type,
             )
         return self._object_url(key)
+
+    async def delete_object(self, *, key: str) -> None:
+        session = get_session()
+        kw: dict[str, object] = {'region_name': self._region}
+        aid = self._access_key_id
+        sk = self._secret_access_key
+        ep = self._endpoint_url
+        if aid:
+            kw['aws_access_key_id'] = aid
+        if sk:
+            kw['aws_secret_access_key'] = sk
+        if ep:
+            kw['endpoint_url'] = ep
+        async with session.create_client('s3', **kw) as client:
+            await client.delete_object(Bucket=self._bucket, Key=key)
diff --git a/src/presentation/dependencies/__init__.py b/src/presentation/dependencies/__init__.py
index 8c1b5f3..f8015be 100644
--- a/src/presentation/dependencies/__init__.py
+++ b/src/presentation/dependencies/__init__.py
@@ -2,6 +2,7 @@ from src.presentation.dependencies.commands import (
     get_get_me_command,
     get_set_phone_command,
     get_set_avatar_command,
+    get_delete_avatar_command,
     get_set_encrypted_mnemonic_start_command,
     get_set_encrypted_mnemonic_complete_command,
     get_update_bank_details_start_command,
diff --git a/src/presentation/dependencies/commands.py b/src/presentation/dependencies/commands.py
index 62bd18f..f37c215 100644
--- a/src/presentation/dependencies/commands.py
+++ b/src/presentation/dependencies/commands.py
@@ -1,6 +1,6 @@
 from fastapi import Depends
 from src.application.abstractions import IUnitOfWork
-from src.application.commands import GetMeCommand, SetPhoneCommand, SetAvatarCommand, SetEncryptedMnemonicStartCommand, SetEncryptedMnemonicCompleteCommand, UpdateBankDetailsStartCommand, UpdateBankDetailsCompleteCommand, ChangePasswordStartCommand, ChangePasswordCompleteCommand, ChangeEmailStartCommand, ChangeEmailConfirmOldCommand, ChangeEmailCompleteCommand
+from src.application.commands import GetMeCommand, SetPhoneCommand, SetAvatarCommand, DeleteAvatarCommand, SetEncryptedMnemonicStartCommand, SetEncryptedMnemonicCompleteCommand, UpdateBankDetailsStartCommand, UpdateBankDetailsCompleteCommand, ChangePasswordStartCommand, ChangePasswordCompleteCommand, ChangeEmailStartCommand, ChangeEmailConfirmOldCommand, ChangeEmailCompleteCommand
 from src.application.contracts import ILogger, ICache, IQueueMessanger, IHashService, IS3
 from src.presentation.dependencies.cache import get_cache
 from src.presentation.dependencies.logger import get_logger
@@ -35,6 +35,15 @@ def get_set_avatar_command(
     return SetAvatarCommand(unit_of_work=unit_of_work, logger=logger, cache=cache, s3=s3)
 
 
+def get_delete_avatar_command(
+    logger: ILogger = Depends(get_logger),
+    unit_of_work: IUnitOfWork = Depends(get_unit_of_work),
+    cache: ICache = Depends(get_cache),
+    s3: IS3 = Depends(get_s3_storage),
+) -> DeleteAvatarCommand:
+    return DeleteAvatarCommand(unit_of_work=unit_of_work, logger=logger, cache=cache, s3=s3)
+
+
 def get_set_encrypted_mnemonic_start_command(
     logger: ILogger = Depends(get_logger),
     unit_of_work: IUnitOfWork = Depends(get_unit_of_work),
diff --git a/src/presentation/routing/account_settings.py b/src/presentation/routing/account_settings.py
index 9b8bd00..f6d6280 100644
--- a/src/presentation/routing/account_settings.py
+++ b/src/presentation/routing/account_settings.py
@@ -1,16 +1,17 @@
 from fastapi import APIRouter, Depends, Request
 from fastapi.responses import ORJSONResponse
 from starlette import status
-from src.application.commands import SetPhoneCommand, SetAvatarCommand
+from src.application.commands import SetPhoneCommand, SetAvatarCommand, DeleteAvatarCommand
 from src.application.domain.dto import AuthContext
 from src.presentation.decorators import require_access_token, csrf_protect
 from src.presentation.dependencies import (
+    get_delete_avatar_command,
     get_set_avatar_command,
     get_set_phone_command,
 )
 from src.presentation.schemas import SetAvatarRequest, SetPhoneRequest
 from src.presentation.schemas.api_errors import ApiErrorPayload, ApiValidationErrorsPayload
-from src.presentation.schemas.me_public import SetAvatarPublicResponse
+from src.presentation.schemas.me_public import MeUserPublicResponse, SetAvatarPublicResponse
 from src.presentation.serializers import me_user_public
 
 
@@ -45,6 +46,26 @@ _SET_AVATAR_ERROR_RESPONSES: dict[int, dict[str, object]] = {
 }
 
 
+_DELETE_AVATAR_ERROR_RESPONSES: dict[int, dict[str, object]] = {
+    status.HTTP_401_UNAUTHORIZED: {
+        'description': 'Не передан или неверен access token.',
+        'model': ApiErrorPayload,
+    },
+    status.HTTP_404_NOT_FOUND: {
+        'description': 'Учётная запись не найдена.',
+        'model': ApiErrorPayload,
+    },
+    status.HTTP_500_INTERNAL_SERVER_ERROR: {
+        'description': 'Внутренняя ошибка сервера; клиенту отдаётся обобщённое сообщение.',
+        'model': ApiErrorPayload,
+    },
+    status.HTTP_503_SERVICE_UNAVAILABLE: {
+        'description': 'S3 не сконфигурирован или временная недоступность удаления объекта.',
+        'model': ApiErrorPayload,
+    },
+}
+
+
 @account_settings_router.patch(path='/phone', response_class=ORJSONResponse, status_code=status.HTTP_200_OK)
 @csrf_protect()
 async def set_phone(
@@ -64,7 +85,8 @@ async def set_phone(
     response_model=SetAvatarPublicResponse,
     summary='Обновить аватар',
     description=(
-        'Принимает фото в Base64, сохраняет как WebP в объектном хранилище и записывает публичный URL в профиль.'
+        'Принимает фото в Base64, сохраняет как WebP в объектном хранилище и записывает публичный URL в профиль. '
+        'После успешной записи удаляется предыдущий объект в S3 (если ссылку удаётся сопоставить с ключом).'
     ),
     response_description=(
         'Профиль пользователя в том же формате, что и GET /me, плюс размер сохранённого WebP.'
@@ -82,6 +104,27 @@ async def set_avatar(
     pub = me_user_public(user)
     return SetAvatarPublicResponse(**pub.model_dump(), webp_size_bytes=webp_size)
 
+
+@account_settings_router.delete(
+    path='/avatar',
+    response_class=ORJSONResponse,
+    status_code=status.HTTP_200_OK,
+    response_model=MeUserPublicResponse,
+    summary='Удалить аватар',
+    description=(
+        'Удаляет файл в объектном хранилище при известном URL и обнуляет avatar_link в профиле.'
+    ),
+    responses=_DELETE_AVATAR_ERROR_RESPONSES,
+)
+@csrf_protect()
+async def delete_avatar(
+    request: Request,
+    auth: AuthContext = Depends(require_access_token),
+    command: DeleteAvatarCommand = Depends(get_delete_avatar_command),
+) -> MeUserPublicResponse:
+    user = await command(user_id=auth.user_id)
+    return me_user_public(user)
+
 #
 # @account_settings_router.post(path='/encrypted-mnemonic/start', response_class=ORJSONResponse, status_code=status.HTTP_200_OK)
 # async def encrypted_mnemonic_start(