To provide a remote control unit capable of displaying many pieces of information in a display part without impairing design of a bathroom interior even when the liquid crystal display part is enlarged.

The remote control unit (a bath remote control) 2 attached to an indoor wall surface and controlling operation of a hot water supply device installed outdoors is composed of a remote control body 21 fixed to a surface of a mirror 11, and the tabular display part 3. The display part 3 is rectangular, and in a form of the present embodiment, the remote control body 21 is connected to a right side of the display part 3. Enlargement of the remote control body 21 is prevented even when a large display part 3 is provided, and the design of the bathroom interior is not impaired.