PURPOSE: To cope with the work in a narrow space by using a car as a handcart, loading an excavating section only onto the handcart and having the power supply from other power-source such as a dump car, a crane car, etc.

CONSTITUTION: A car for working is constituted of a handcart 1, a swivel base 3, a loading bench 4, first boom 6, second boom 8, a bucket 11, hydraulic cylinders 12, 13 and 14, a hydraulic hose 20 and an operation lever 15. The handcart 1 only is moved to the working site by manpower, and a branch circuit of the hydraulic circuit of the car for working 18 is provided by the hydraulic hose 20 to connect to an operation section of the handcart 1. Then, the oil pressure is supplied to each hydraulic cylinder 12, 13 and 14 by operation of the operation lever 15 to have the bucket 11 excavate by expansion of the first boom 6 and the second boom 8. According to the constitution, an excavation work and a hole digging work by power can be executed a narrow space.