diff --git a/collection/core/models.py b/collection/core/models.py
index 8490e95..24ca680 100644
--- a/collection/core/models.py
+++ b/collection/core/models.py
@@ -48,6 +48,8 @@ class Item(models.Model):
             default=cls.DEFAULT_CHOICE,
             verbose_name=_('status'))
         status_field.contribute_to_class(cls, 'status')
+        # check that no other same item name on same collection exists
+        cls._meta.unique_together = (('collection', 'name'), )
 
     class Meta:
         abstract = True