To provide an RFID tag, even if used being attached to a product and an article liable to subject to bending stress, preventing easy occurrence of mechanical damage and capable of retaining an original function of the RFID tag.

An IC tag inlet comprises an inlet base material, and a linear antenna and an IC chip that are disposed on the inlet base material and connected to each other, a protective sheet is stuck on the front and back sides of the IC tag inlet to constitute a reinforced inlet, and the reinforced inlet is buried in a jacket material to constitute an IC tag. In the elongated IC tag in a plan view, recesses extending in the longitudinal direction and short-side direction in the plan view are provided to the IC tag inlet at some interval apart from the IC chip and a connecting part between the IC chip and the linear antenna, on one surface or both surfaces of the protective sheet.