An electrical connector (100), comprising an insulative housing (1) and a plurality of contacts (2) received in the insulative housing. The insulative housing defines a base portion (11) and a mating portion (12) in front of the base portion, the mating portion defines a plurality of receiving channels (124) extending along a mating direction. The contacts are received in the insulative housing, and inserted into the receiving channels along a front-to-back direction. Each contact has a soldering portion (21) extending through the receiving channel and assembled to the base portion of the insulative housing, a retaining portion (23) located in front of the soldering portion and held in the receiving channel, and a contacting portion (24) received in the mating portion of the insulative housing, the retaining portion has a higher barb (231) in the front and a lower barb (232) on a rear section thereof on both sides.