A work machine (lawnmower) comprises: a main body unit having a work unit that performs a prescribed operation; and a travel motor that generates a rotational drive force that causes at least the main body unit to travel. The work machine also comprises: a travel operation unit that issues command information relating to the rotation speed of the travel motor; and a control unit that varies the rotation speed of the travel motor commanded by the travel operation unit on the basis of variation in the load on the work unit.