To provide a non-contact IC card whose manufacturing process is simplified and whose conductive resistance can be made small, an RFID device (radio frequency identification) used for a TAG for physical distribution, etc., and its manufacturing method.

An antenna coil 16 that is formed on an insulation substrate 10 and is for performing radio communication is formed by performing press punching of metal foil such as Cu, Al, Au, Ag, into a coil shape by a sharp blade made of metal etc. The manufacturing process is simplified because a coil pattern is not formed by an etching process but by press working by the sharp blade. The conductor intervals of the antenna coil can be made narrow as 0.1 to 0.2 mm, which is remarkably narrower than in the conventional practice. As a result, the conductive resistance can be made small and a radio characteristic can be improved because a coil conductor width can inevitably be large.