To relay signal transmission between a first connector and a second connector by a flexible printed circuit board.

This stacked electric card connector comprises the first connector, the second connector and the flexible printed circuit board. The flexible printed circuit board has terminals for relaying smart card signals and soldering holes for soldering the terminals of the second connector. The first connector includes a first body and a first metal housing, can house a smart card with the first body and the first metal housing mounted and provided with an open hole and a lock part for positioning and fixing the flexible printed circuit board to the first metal housing.