To provide a printer device which has an excellent communication function and also is made lightweight.

Disclosed are printer devices 1 and 14 each having a device main body part 2, at least one of paper holders 3 and 4 attached to the device main body part 2, a radio communication circuit 5 incorporated in the device main body part 2, and an antenna 7 connected to the radio communication circuit 5, where a slot antenna 7 constituted by forming a first slot 8, a second slot 9 in a different shape from the first slot 8, and a slot-shaped feed portion 10 coupling the first slot 8 and second slot 9 at one conduction portion 6 is attached as the antenna 7 to at least one of the paper holders 3 and 4, and the first slot 8 and second slot 9 are different in inter-part distance determining a 1/2 wavelength at a resonance point.