To provide a self-propelled treatment machine capable of carrying out a crushing treatment in the state of running at a sufficient crushing capacity even when the rotation of its engine temporarily decreases to an idling rotation speed.

The self-propelled treatment machine is characterized by including a crusher 12 driven by hydraulic oil supplied from a hydraulic pump 94 driven by an engine 93 to carry out a crushing treatment of an object to be treated, a transfer conveyor 11 that transfers the object to be treated to the crusher 12 from a feed port through which the object to be treated is charged thereinto from the outside of the machine body, a discharge conveyor 3 that discharges the treated object coming from the crusher 12 to the outside of the machine body, buttons 83Da1, 83Da2, 83Da3 that instruct the actions of the transfer conveyor 11, and causes the rotation speed of the engine 93 to return from an idling rotation speed to a predetermined work rotation speed in accordance with the instruction of the buttons 83Da1, 83Da2, 83Da3 to start the transfer conveyor 11.