PURPOSE: To obtain a simple shovel working machine for removing the snow by using a system in which a shovel is pivotally supported on the middle of a bracket provided in the front of a working machine in such a way as to enable the front of the shovel to be positioned inclining downward to the face to be touched by the ground of a crawler.

CONSTITUTION: Brackets 16a and 17a are provided to the front of a mobile working machine with a crawler 11 and a drive wheel 5, and a shovel 30 is pivotally attached 19 to the middle of the brackets 16a and 17a. In removing the snow, the striker 39 of the shovel 30 is coupled with the locking mechanism 20 of the machine, thereby enabling the shovel 30 to scoop and rake the snow S into the opening 35 of the front end when advancing the machine. A handle 4 is pushed down, the shovel 30 is separated from the ground's surface G3, the working machine is moved, the couplement of the locking mechanism 20 is released at the dumping site, and the shovel 30 is turned to throw down the snow.