The invention relates to a movable contact unit and manufacturing method thereof. An upper surface of movable contact (23) made of a conductive metal plate is adhesively fixed to adhesive layer (22) formed on the underside of base film (21), an upper surface of separator (25) is affixed to adhesive layer (22) in a manner to sandwich movable contact (23) between them, and the periphery of movable contact (23) is heated and pressed in a circular shape from above base film (21) to form a convex-shaped portion in an area of base film (21) corresponding to movable contact (23) in a manner to fit along a dome-like shape of movable contact (23) and to make a peripheral area, or a base of the convex-shaped portion pressed circularly into close adhesion to separator (25) with adhesive layer (22). Thereby, the manufacturing efficiency of movable contact unit (24) can be increased.