A terminal module is applied in an electrical connector having an insulating body, and includes first terminals, a first fixing bracket, second terminals, and a second fixing bracket. The first terminals and the second terminals are arranged parallel to each other along the same direction. The first fixing bracket is configured to fix the first terminals and the second fixing bracket is configured to fix the second terminals. The first fixing bracket is provided with a positioning hole extending along the arrangement direction of the first terminals. Furthermore, a positioning portion protrudes from the second fixing bracket in the direction towards the first fixing bracket, and corresponds to the positioning hole.Therefore, the first fixing bracket and the second fixing bracket are inserted into each other through the insertion of the positioning portion into the positioning hole, and are further received in the insulating body of the electrical connector.