diff --git a/apps/account/tasks.py b/apps/account/tasks.py
index 528cb35e..61610c82 100644
--- a/apps/account/tasks.py
+++ b/apps/account/tasks.py
@@ -1,11 +1,14 @@
 """Account app celery tasks."""
+import datetime
 import inspect
 import logging
 
 from celery import shared_task
 from django.utils.translation import gettext_lazy as _
+from celery.schedules import crontab
+from celery.task import periodic_task
 
-from account.models import User
+from account.models import User, UserRole, Role
 
 logging.basicConfig(format='[%(levelname)s] %(message)s', level=logging.INFO)
 logger = logging.getLogger(__name__)
@@ -46,3 +49,17 @@ def change_email_address(user_id, country_code, emails=None):
 def send_password_changed_email(user_id, country_code):
     """Send email which notifies user that his password had changed"""
     send_email(user_id, 'Notify password changed', 'notify_password_changed_template', country_code)
+
+
+@periodic_task(run_every=crontab(hour='*/3'))
+def clean_unaccepted_establishment_team_invites():
+    """This task cleans unaccepted (for 7 days) establishment team membership invites."""
+    week_ago = datetime.datetime.now() - datetime.timedelta(days=7)
+    roles_to_remove = UserRole.objects.filter(role__role=Role.ESTABLISHMENT_ADMINISTRATOR,
+                                              for_team=True, created__lte=week_ago)\
+        .exclude(state=UserRole.VALIDATED).prefetch_related('user', 'role')
+    for user_role in roles_to_remove:
+        user = user_role.user
+        user_role.delete()
+        if user.last_login is None:
+            user.delete()