The invention relates to an electric connector into which a flat cable provided with two positioning holes is inserted. The electric connector comprises an insulating body, a metal shell body and two elastic positioning pieces. The insulating body is provided with a top plate, a bottom plate and a plug slot. Each elastic positioning piece and the metal shell body are integrally formed, and each elastic positioning piece is located in the plug slot. When passing the elastic positioning pieces, the positioning holes of the flat cable are formed in positioning parts of the elastic positioning pieces in a sleeved mode respectively, the positioning parts of the elastic positioning pieces are used for limiting the flat cable, and therefore the flat cable cannot be separated from the insulating body.