In a connector, a connector housing includes a terminal accommodating chamber in which a female terminal is to be accommodated, an elastic locking piece configured to lock the female terminal accommodated in the terminal accommodating chamber, and a wall surface. A male terminal insertion hole and a male terminal release hole are formed in the wall surface. A male terminal of a counterpart connector is to be inserted into the male terminal insertion hole so as to be connected to the female terminal, when a fitting operation between the connector and the counterpart connector is performed in a regular fitting posture. The male terminal is to enter the male terminal release hole, when the fitting operation is performed in an irregular fitting posture. The male terminal release hole forms a space which is continuous from the wall surface to the elastic locking piece.