diff --git a/addons/account/models/reconciliation_widget.py b/addons/account/models/reconciliation_widget.py
index e3bc2630c1d..c8ab48d5289 100644
--- a/addons/account/models/reconciliation_widget.py
+++ b/addons/account/models/reconciliation_widget.py
@@ -428,6 +428,7 @@ class AccountReconciliation(models.AbstractModel):
             '|', ('move_id.name', 'ilike', search_str),
             '|', ('move_id.ref', 'ilike', search_str),
             '|', ('date_maturity', 'like', search_str),
+            '|', ('payment_id.check_number', '=', search_str),
             '&', ('name', '!=', '/'), ('name', 'ilike', search_str)
         ]
         if search_str[0] in ['-', '+']: