A socket, adapted for electrically connecting an IC package to a printed circuit board, comprises an insulative housing accommodating a plurality of contacts and a cover pivotally assembled on an end of the insulative housing. The insulative housing has two lateral sides and a base portion disposed between the lateral sides, and each lateral side is formed with two incepting portions on two opposite ends thereof. The cover has two fixing portions extending downwardly from two sides thereof and corresponding to the incepting portions of the insulative housing. When the cover rotates to a close position, the fixing portion of the cover directly latches the incepting portion of the insulative housing to prevent the cover from tilting.