In order to make it easy to send and receive identification information of a work device, this work device is provided with: a work unit which performs work; a frame which supports the work unit and can be linked to a vehicle body; and a wireless tag which is attached to the work unit or the frame and comprises a storage unit, for storing at least identification information, and a communication unit, for transmitting identification information. The work vehicle is provided with a vehicle body, a linking unit provided on the vehicle body for linking the work device, and a wireless tag reader which is attached to the vehicle body or the linking unit and which can receive identification information of the work device.