To provide an operation assisting tool capable of suppressing deterioration of workability and reducing the physical burden of a worker.SOLUTION: The work aid includes a main body member mounted on the back of a worker, a first arm member connected to the main body member via a coupling mechanism and rotatable around a first rotation axis, And a moving mechanism provided between the first arm member and the holding member and supporting the holding member so as to be relatively movable with respect to the first rotating shaft.BACKGROUND OF THE INVENTION【課題】作業性の低下を抑制し、作業者の肉体的負担を軽減できる作業補助具を提供する。【解決手段】作業補助具は、作業者の背中に装着される本体部材と、連結機構を介して本体部材と連結され、第1回転軸を中心に回動可能な第1アーム部材と、作業者の腕の少なくとも一部を保持する保持部材と、第1アーム部材と保持部材との間に設けられ、第1回転軸と相対移動可能に保持部材を支持する移動機構と、を備える。【選択図】図1