To provide a DX armature structure by which a camera is thinned in thickness.

A leaf-spring-shaped DX armature coming into contact with a DX code formed on the surface of a film cartridge loaded in the camera is connected to a circuit board, and equipped with a nearly linear base part supported in a camera body, a bent part bent and extended from the base part, an armature part positioned along the bent part nearly in parallel and in a non-contact state therewith and a rotating part connecting the armature part and the bent part. A DX contact part coming into contact with the DX code is formed at the armature part.