Abstract: A service machine stopping apparatus is provided for a midget rotary power shovel wherein an upper rotary member is rotatably disposed on a lower travelling member capable of self-travelling and a service machine is mounted onto the upper rotary member. The stopping apparatus comprises operation valves for controlling each of a boom cylinder, an arm cylinder and an offset cylinder. Solenoid valves disposed in tubing connecting each operation valve with each cylinder are switched from a communication position to a cut-off position when the service machine reaches a critical region of space, and check valves for check the flow in the cylinder direction when in the cut-off position.