A shielding assembly includes a cage (40), a shielding plate (10), and a gasket (50). The cage includes a front end portion (41), a rear end portion (43) opposite to the front end portion, a plurality of clips (45) protruding from the front end portion, a pair of sidewalls (44), and a back wall (46). The shielding plate attached to the front end portion of the cage, includes a main portion (12), a plurality of resilient tabs (14) projecting from an inner surface of the main portion, and a plurality of through hatches (16) in the main portion for receiving the clips. The gasket is attached to the rear end portion and abuts against outer surfaces (49) of the sidewalls and the back wall.