A socket comprises an insulating housing receiving a plurality of contacts, and a pick-up cap engaging with the insulating housing. The pick-up cap has a planar main body covering the insulating housing. The main body is formed with two pivots on a side thereof. The insulating housing is formed with a plurality of sidewalls, one of the sidewall is provided with a pair of mounting seats on an outside thereof, each mounting seat defines a mounting hole with a gap, and the pivots of the pick-up cap enter into the mounting holes via the gaps to pivotally assemble the pick-up cap to the mounting seats.