An IC socket includes a socket body (10) defining a plurality of passageways (102), and terminals (20) insertable into each of the passageways. A retention projection (1020) extends into the passageway. Each terminal includes a slot at a middle portion thereof for receiving the retention projection. The slot defines a closed boundary line for restricting the retention projection such that movement of the terminal along a length axis of the passageway is limited within a predetermined distance, thereby preventing the terminal from being removed therefrom.