Abstract: A robot includes: an arm; a shaft supported at a tip of the arm so as to be movable in a direction of a predetermined axis; a power transmitting unit fixed to the arm and connected to a power supply; and a power receiving unit and a battery that are fixed to the shaft. In a state in which the shaft is positioned at a predetermined position in the direction of the axis, the power receiving unit is close to the power transmitting unit to wirelessly receive power transmitted from the power transmitting unit, and the battery stores the power received by the power receiving unit and uses the power as a power source of a device attached to the shaft.