To provide an optimum position of a side-handle even in any working posture.

Structurally, a side-handle upper-end support part 3a can rotate on a vertical axis with respect to a longitudinal direction of a body 1, and a side-handle lower-end support part 3b can move centering on the side-handle upper-end support part 3a. Thus, a position can be changed between an angle position to be elongated in the vertical direction of the body in a side view of the body and an angle position to be elongated in an inclined manner downward on the side of a back end of the body from upward on the side of a front end of the body.