A connector includes a contact, a housing having a cavity into which the contact may be inserted formed therein, the housing retaining the contact inserted into the cavity, and a retainer piece that may be inserted into the cavity in the direction opposite to an insertion direction. The housing includes a pressing piece that moves the contact inserted into the cavity in the moving direction substantially perpendicular to the insertion direction, an abut part that the contact abuts due to the movement by the pressing piece, and a locking member that locks the contact abutted to the abut part. The retainer piece is inserted into a back-side gap formed between the contact and an inner wall surface of the housing due to the movement by the pressing piece.