To provide a non-contacting radio frequency identification(RF-ID) medium which avoids losing of conductivity due to bending, etc., which has no problem that a base material is damaged in a production process, which is gentle to environment, which dispense with sorting processing such as recovering metal from scraps, which can be mass-produced at a low cost, and which can be applied to the forms of a non-contacting IC card, a tag, a label, a form, a post card, an envelope, etc.

The non-contacting (RF-ID) medium uses conductive polymer provided with a conductive circuit part formed with conductive conjugated system polymer as a primary material. It is preferable to use conductive conjugated system polymer doped with a dopant.