PURPOSE: To facilitate electric plating and reduce the cost of FPC or a tape carrier by plating electrically all wirings of a wiring pattern installed on a tape carrier and FPC or the like with a jig which makes an electric connection.

CONSTITUTION: A material of a tape carrier 5 is carried to a plating tank where a jig 1 places each wiring in an electrically connected state in the plating tank and connected to a lead wire 7 and solder-plated. In the case when the wirings on the tape carrier 5 in this device are independent and not connected to each other, it is possible to carry out electric plating by using the jig 1. The jig 1 consists of three sections, namely, a reinforcing part 6 which supports other parts, and the connection part 7 which connects wiring electrically in contact with a wiring 2 and a lead part 8 which supplies electricity to the wiring 2 by way of the connection part 7. This construction makes it possible to manufacture FPC and tape carriers at low cost.