To provide a contactless data carrier capable of reading information from plural directions and its assembly.

The contactless data carrier 30 is provided with a flexible substrate 31 and a booster antenna 33 disposed in the substrate 31. The substrate 31 has a central face 31a and circumferential faces 31b to 31e communicated and bent through a substrate folded lines 35 at the circumference of the central face 31a. The antenna 33 is bent corresponding to the lines 35 and is disposed on the central face 31a and the circumferential faces 31b to 31e.