diff --git a/addons/hr_expense/models/hr_expense.py b/addons/hr_expense/models/hr_expense.py
index 2dc00149bc1f7..b6277243cc8a5 100644
--- a/addons/hr_expense/models/hr_expense.py
+++ b/addons/hr_expense/models/hr_expense.py
@@ -172,19 +172,24 @@ def action_move_create(self):
         '''
         main function that is called when trying to create the accounting entries related to an expense
         '''
+        move_group_by_sheet = {}
         for expense in self:
             journal = expense.sheet_id.bank_journal_id if expense.payment_mode == 'company_account' else expense.sheet_id.journal_id
             #create the move that will contain the accounting entries
             acc_date = expense.sheet_id.accounting_date or expense.date
-            move = self.env['account.move'].create({
-                'journal_id': journal.id,
-                'company_id': self.env.user.company_id.id,
-                'date': acc_date,
-                'ref': expense.sheet_id.name,
-                # force the name to the default value, to avoid an eventual 'default_name' in the context
-                # to set it to '' which cause no number to be given to the account.move when posted.
-                'name': '/',
-            })
+            if not expense.sheet_id.id in move_group_by_sheet:
+                move = self.env['account.move'].create({
+                    'journal_id': journal.id,
+                    'company_id': self.env.user.company_id.id,
+                    'date': acc_date,
+                    'ref': expense.sheet_id.name,
+                    # force the name to the default value, to avoid an eventual 'default_name' in the context
+                    # to set it to '' which cause no number to be given to the account.move when posted.
+                    'name': '/',
+                })
+                move_group_by_sheet[expense.sheet_id.id] = move
+            else:
+                move = move_group_by_sheet[expense.sheet_id.id]
             company_currency = expense.company_id.currency_id
             diff_currency_p = expense.currency_id != company_currency
             #one account.move.line per expense (+taxes..)
@@ -235,9 +240,10 @@ def action_move_create(self):
             lines = map(lambda x: (0, 0, expense._prepare_move_line(x)), move_lines)
             move.with_context(dont_create_taxes=True).write({'line_ids': lines})
             expense.sheet_id.write({'account_move_id': move.id})
-            move.post()
             if expense.payment_mode == 'company_account':
                 expense.sheet_id.paid_expense_sheets()
+        for move in move_group_by_sheet.values():
+            move.post()
         return True
 
     @api.multi