diff --git a/openerp/osv/orm.py b/openerp/osv/orm.py
index cd625bc2009..9bf10df39d6 100644
--- a/openerp/osv/orm.py
+++ b/openerp/osv/orm.py
@@ -4050,6 +4050,7 @@ class BaseModel(object):
         self.check_access_rights(cr, uid, 'unlink')
 
         ir_property = self.pool.get('ir.property')
+        ir_attachment_obj = self.pool.get('ir.attachment')
 
         # Check if the records are used as default properties.
         domain = [('res_id', '=', False),
@@ -4088,6 +4089,13 @@ class BaseModel(object):
             if ir_value_ids:
                 ir_values_obj.unlink(cr, uid, ir_value_ids, context=context)
 
+            # For the same reason, removing the record relevant to ir_attachment
+            # The search is performed with sql as the search method of ir_attachment is overridden to hide attachments of deleted records
+            cr.execute('select id from ir_attachment where res_model = %s and res_id in %s', (self._name, sub_ids))
+            ir_attachment_ids = [ir_attachment[0] for ir_attachment in cr.fetchall()]
+            if ir_attachment_ids:
+                ir_attachment_obj.unlink(cr, uid, ir_attachment_ids, context=context)
+
         for order, object, store_ids, fields in result_store:
             if object == self._name:
                 effective_store_ids = list(set(store_ids) - set(ids))