PROBLEM TO BE SOLVED: To provide an arm motion auxiliary device of favorable feeling of wear which does not narrow down a wear's field of view and prevents the wear from feeling a psychological stress.SOLUTION: An arm motion auxiliary device 1 mounted on a human body 2 to assist the motion of an arm 3 of the human body 2 is configured by having a support member 10 fixed relatively to the body 4, an arm holding member 20 mounted on the arm 3, and a coupling mechanism 30 that couples the support member 10 with the arm holding member 20, the coupling mechanism 30 being equipped with at least two rotary shafts 41, 43, 44, having a horizontal motion mechanism part 40, which makes the arm holding member 20, in the state that the arm motion auxiliary device 1 is mounted on the human body 2, movable in a horizontal direction to the support member 10 by rotation around the rotary shafts 41, 43, 44, and the coupling mechanism 30 being arranged, in the state that the arm motion auxiliary device 1 is mounted on the human body 2, ahead of and/or behind and/or side of the body 4.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】着用者の視野を狭めることがなく、また、着用者が心理的なストレスを感じることがない装着感のよい腕動作補助装置を提供する。【解決手段】人体２に装着されて人体２の腕３の動作を補助する腕動作補助装置１を、胴体４に対して相対的に固定される支持部材１０と、腕３に装着される腕保持部材２０と、支持部材１０と腕保持部材２０とを連結する連結機構３０とを有し、連結機構３０が、少なくとも２つの回動軸４１、４３、４４を備え、腕動作補助装置１が人体２に装着された状態において、回動軸４１、４３、４４まわりの回動により腕保持部材２０を支持部材１０に対して水平方向に移動自在とする、水平動機構部４０を有し、腕動作補助装置１が人体２に装着された状態において、連結機構３０が胴体４の前方及び／又は後方及び／又は側方に配置される構成とする。【選択図】図１
