Abstract: An electrical connector connected to a printed circuit board includes an insulative housing, a plurality of contacts received in the housing, a spacer member including a body portion projecting from a mounting surface of the housing and a neck portion projecting from a top surface of the body portion, and a board lock member extending from the neck portion of the spacer member for engaging with a board lock reception hole defined in the printed circuit board. The neck portion of the spacer member is received in the board lock reception hole of the printed circuit board for preventing solder from flowing from a lower surface of the printed circuit board to an upper surface thereof via the board lock reception hole. The top surface of the body portion of the spacer abuts against the upper surface of the printed circuit board thereby forming a space between the mounting surface of the connector and the upper surface of the printed circuit board.