To provide a card reader-writer, provided with a card carrying mechanism, having such mechanical strength as to be durable to actual use environments to be resistant to constantly added tension causing cutting or elongation, and achieving low cost, which is capable of controlling and maintaining high card carrying position precision for a long period.

A carrying belt 7 is provided with a projected part 7b to make a T-shaped cross section. A long assembly comprising a plurality of polyester fibers twisted into a bundle is used for a core member 10 to be plurally embedded in the belt rotation direction. The core member and a rubber elastic member as base material of the belt are heat-treated with solvent-based adhesive agent to be fixed and molded with each other.