It is difficult for elderly peoples to rise from chair because of muscle deterioration. This paper proposes the elderly people's rising action and its support tool. The points of adequate rising action are pulling legs, making the upper body lean forward, and making knee angle obtuse. To realize those points, we proposed an adequate rising procedure and developed a cushion type rising support tool that could change seating angle freely. When using the support tool, the values of acceleration, arm force, rising time, and antiversion angle related to rising action were improved.