The invention provides a connector including a housing, contacts, and an actuator. The housing includes a first depression and second depressions. The second depressions include bottom surfaces. The contacts include hooks to be disposed within the first depression. The actuator includes bosses, received in the second depressions, and a shaft, received in the first depression. The bosses each include an axial center and first and second contact portions. The distance between the axial center and the first contact portion is smaller than the distance between the axial center and the second contact portion. When the actuator is in an upright position, the first contact portions are on the bottom surfaces and the shaft is on the lower side of the hooks. When the actuator rotates to a lying position, the bosses rotate along the bottom surfaces and the shaft move to the upper side to be engaged with the hooks.