An electrical connector (100) includes an insulative housing and a plurality of contacts (3) retained in the insulative housing. The insulative housing includes a number of receiving slots (110) and a number of retaining slots (22) communicating with each other along a front-to-back direction. Each contact (3) has a securing portion (30) engaging with the retaining slot (22), a contact portion (33) extending forwardly into the receiving slot (110) from the securing portion (30), and a tail portion (34) extending out of the insulative housing from the securing portion (30). The retaining slot (22) defines a first inclined face (220) at an inner wall thereof. The securing portion (30) has a second inclined face (300) corresponding to the first inclined face (220) and abutting against the first inclined face (220).