An electrical connector includes a plurality of terminals and an insulating housing retained said plurality of terminals. Each terminal includes a retaining portion and a plane contacting portion. The contacting portion has a pre-folded line along which a front end of the contacting portion slants. The insulating housing includes a base portion, a tongue portion extending forward from the base portion and passageways extending in the base portion and the tongue portion to receive the terminals. Each passageway defines a first supporting surface to sustain the front end of the terminal and a second supporting surface to sustain the retained portion of the terminal. A room is defined between said two supporting surface along a rear-to-front direction to accommodate the front ends of the terminals during insertion of the terminal to the passageway.