To provide a self-propelling type treatment machine which easily performs the detaching work and attaching work of a feed-out conveyor for feeding out the treated matter discharged from a treatment apparatus.

In the self-propelling type treatment machine equipped with the body frames 3 arranged at positions high than a left running device 1 and a right running device 2 and connected to the left running device 1 and the right running device 2 and the feed-out conveyor 4 for feeding out the wood chips discharged from the crushers 81 installed on the body frames 3, the feed-out conveyor 4 includes the guide means provided above the bridging part 22 for connecting a left running frame 20 forming the skeleton of the left running device 1 and a right running frame 21 forming the skeleton of the right running device 2 to be inserted between the left and right supports 23 and 24 vertically provided to the bridging part 22 so as to be arranged in left and right directions and guiding the movement in the insertion and pulling-out directions parallel to the surface of land and fixed on the sides of the left and right running devices 1 and 2 in a posture movable in the direction parallel to the surface of land.