A connector includes a housing (10) connectable to a mating housing (90), a detector (40) arranged movably from a standby position to a detection position with respect to the housing (10). A movement from the standby position to the detection position is restricted by locking portions (47) locking stoppers (33) of the housing (10). A lever (60) arranged displaceably from an initial position to a connection position with respect to the housing (10), the both housings (10, 90) is connected toward the connection position by the lever. The lever (60) includes releasing portions (66) for releasing a locked state by pressing the locking portions (47) when the lever is displaced to the connection position.