To provide a connector with a locking member in which the lock member is positioned, in such a manner as not to be extremely opened sideways, other packaging parts can be fixed adjacent to it, and moreover locking operation is made easy.

A locking member 30 is turnably disposed in a connector housing 2. A main body 38 of the locking member 30 and a shallow angled tab 34 (a positioner) are formed in the lock member 30. Consequently, when the lock member 30 is opened, the main body 38 is held at a predetermined position in a relatively standing state, after a counterpart connector 80 is fully inserted, the lock member 30 is pushed in B direction so as to engage with the connector 80.