PROBLEM TO BE SOLVED: To provide a support device used for supporting standing motion, seating motion and walking movement motion of a care-receiver having difficulty in standing up and walking.SOLUTION: A standing/seating movement support device includes: armrest plate bodies 100 on which the elbows, the fore-arms and the hands of a care-receiver are placed and to which the body weight is applied; lifting/lowering frames 300 that slidingly lift the armrest plate bodies 100 diagonally upward or lower the armrest plate bodies 100 diagonally backward with respect to the body axis of the care-receiver, while retaining the armrest plate bodies 100 horizontally; and bases 400 that are movable on a floor face by having wheels 430 between their selves and the floor face. The armrest plate bodies 100 include, on the upper faces thereof, hand holds 120 that can be held with the hands of the care-receiver and extend in the vertically direction.【課題】起立や歩行が困難な被介護者の起立動作、着座動作、及び歩行移動動作を支援するために使用される支援装置を提供する。【解決手段】被介護者の肘、前腕及び手が置かれて体重がかかる腕置き板体100と、被介護者の体躯に対して前方斜め上方に腕置き板体100を水平に保ったままスライド上昇又は斜め後方に下降させる昇降フレーム300と、床面との間に車輪430が設けられることにより床面上を移動可能な基台400と、を備える。腕置き板体100の上面には被介護者の手にて握ることができる垂直方向に延出する握り棒120が設けられる。【選択図】図1