To alleviate an excessive load applied on the upper limb of an operator when a handle instrument is operated.

When the hand of an operator cannot follow the movement of a grip 1 in response to the magnitude of a load, such as when a device where a handle instrument 10 is mounted goes out of control or a grip section moves beyond the limit where the operator's hand can move, a cylindrical rubber 3 elastically changes its shape according to the magnitude of the load, the grip section 1 leans by against a shaft part 2, and the cylindrical rubber 3 absorbs the load imposed on the hand of the operator.