PROBLEM TO BE SOLVED: To enable users to change the rotation of a cutting blade and the speed of a traveling machine body during mowing by making the rotational speed of an electric motor adjustable.SOLUTION: The mower has an electric motor M which transmits power to a rotary shaft of a cutting blade 3C and a traveling machine body F which travels by power branched from the rotary shaft, and a control lever H attached to the traveling machine body F includes a rotational speed adjustment part 53 which adjusts the target rotational speed of the electric motor M. A control device 50 which controls the rotational speed of the electric motor M controls the electric motor M by weak magnetic field control when the actual rotational speed of the electric motor M is in the range of the target rotational speed that the rotational speed adjustment part 53 sets.
