[Problem] To provide a series hybrid combine wherein a traveling device is driven by a motor with superior shift characteristics, and wherein a small engine having good fuel consumption is mounted as a drive source for the motor. [Solution] A series hybrid combine is provided with: a motor (82) that is driven by electricity from a generator (81) driven by an engine output a traveling device (1) having a left crawler traveling body (1a) and a right crawler traveling body (1b) that are driven independently of each other by rotational power from the motor (82) and a vehicle speed setting operating device for setting vehicle speed according to an operating position. The series hybrid combine is further provided with: a motor rotational speed calculation unit for calculating, on the basis of the operating position, a motor command rotational speed forming a control target rotational speed for the motor and a motor rotational speed modification unit for modifying the motor command rotational speed on the basis of a degree of turning derived from the difference in drive speed for the left crawler traveling body (1a) and the right crawler traveling body (1b).
