PURPOSE: To reduce the weight of the cutting blade side of the subject device and arrange the components in the optimal state corresponding to a working condition by disposing an engine and a reciprocative conversion mechanism at a place near to one end of a frame and also disposing a cutting blade on the other end of the frame.

CONSTITUTION: An engine 3 is disposed on one side of a long lever-like frame 2 and a blade 4 is also disposed on the other side. The frame 2 is moderately bent at a 1/3 portion thereof from the cutting blade-attaching end so as to enable to hold the cutting blade in appropriately parallel to the cutting surface in a state supporting the hair clipper type bush cutter 1. A clutch box 5 and a driving casing 6 are disposed below the engine 3 and a reciprocative conversion mechanism is connected to the cutting blade through the reciprocative sliding plate 17 of a linking member.