An electrical connector includes an insulating housing, a plurality of terminals fixed in the insulating housing and a shell mated with the insulating housing. The insulating housing has a base portion and a mating portion extending from a front surface of the base portion. The mating portion defines a plurality of terminal grooves penetrating through a rear surface of the base portion. Each terminal has a fixed portion received in the corresponding terminal groove and two shoulder portions respectively projecting sideward from two opposite sides of one end of the fixed portion. The base portion defines a receiving trough communicate rear ends of the terminal grooves and outside of the base portion for receiving the shoulder portions. Thus, the terminals can be assembled to the insulating housing conveniently and rapidly during using a tool to push the shoulder portions to insert the terminals into the terminal grooves.