To provide a plating jig by which plating is facilitated and the man- hour and cost of production are reduced and to provide the plating method using the jig.

The through-hole 71 of a lower rubber sheet 70 coincides with the recess 61 of a lower metallic plate 60, one end of a columnar rubber body 50 is engaged with the recess 61, and a step 203 of a holder 200 touches the other end of the rubber body 50. In this moment, the end face of the holder 200 on the side of the larger-diameter part 202 touches the upper face of the lower rubber sheet 70 and the end face on the side of the smaller-diameter part 201 touches the lower face of an upper rubber sheet 80. Since the lower rubber sheet 70 and the upper rubber sheet 80 are brought in close contact with both end faces of the holder 200, the intrusion of the plating soln. into the inner periphery and both end faces of the holder 200 is prevented, and only the outer periphery of the holder 200 can be easily and completely plated with Au. Accordingly, plating is facilitated, and the man-hour and cost of production are reduced.