A lever type connector comprises two connector housings, a lever which is rotatably attached to one housing and has cam grooves, and cam pins which are provided on another housing and guided by the cam grooves. Connecting or disconnecting is assisted by rotating the lever with the cam pins and the cam grooves. Guiding structure is provided between the first and second connector housings for guiding the cam pins to entry gates of the cam grooves respectively as connection of the first and second connector housings proceeds at an initial stage of the connection. According to the lever type connector, the cam pins is guided properly to the entry gates of the cam grooves of the lever at the initial stage of the connection.