The invention relates to an electrical connector, comprising an insulation housing (4) with at least one contact accommodating cavity (6), a slot (28) extending laterally crossed with the cavity and an electrical terminal (50) arranged in the cavity. The terminal is provided with a front U-shaped contact part limited with two contact plates (58) mutually connected side by side of a bend part (60)and an opening (62) extending and partially inserting into the side-by-side contact plates through the bend part. The opening and the slot are aligned when the terminal is totally positioned in the cavity. The electrical terminal is locked in the cavity when a terminal locking part (14) extends through the slot and enters into the opening.