An shielded connector (1) comprises a metal housing (10) configured by first, second, third, fourth sidewalls (102, 101, 103, 100) and a bottom wall (not labeled) defining a receiving space (104) therebetween, first and second terminal inserts securely attached to the first and third sidewalls of the metal housing respectively, first and second metal shield (40) assembled to the first and second terminal insert, and fastening means (50) extending from the metal shield, through the insulating housing and anchored to the first and third sidewalls of the metal housing, respectively. A slit (106) is formed at a portion between the sidewall and the bottom wall of the metal housing so as to improve a true perpendicularity therebetween.