WORKING DEVICE AND WORKING MACHINE PROVIDED THEREWITH

To provide a working device configured to consume regenerative power generated by an electric motor with a regeneration resistor, the working device requiring no dedicated device for cooling the regeneration resistor.A working device (3) to be connected to a traveling vehicle (2) having a prime mover (11), the working device being configured to perform an agricultural work, includes a working portion (32) to rotate to perform an agricultural work, an electric motor (23) to be driven by electric power, a power transmission mechanism (50) to which power generated by the electric motor is inputted, configured to transmit the power to the working portion; and a regeneration resistor (91) to consume a regenerative power generated in the electric motor, the regeneration resistor being arranged at a position to be cooled by wind generated by rotation of the working portion.