To provide a legless chair and a wheelchair usable at home for standing rehabilitation training from a seat in addition to simple inclination of a handrail and a seat plate in view of a present situation that there is no end to fall accidents caused by the limit of caregivers' labor, not to mention the weak in the seating and standing process of the weak who requires care.

The seat plate automatically assists the physical labor limit in a half-rising posture only by leaning on a backrest of the legless chair in a standing state. Particularly in the case of standing, standing is assisted according to ergonomics with the forward movement of the body weight in the seated state and almost the vertical elevation of the seat plate conformed to the body situation. The caregivers' labor is thereby reduced, and the weak is assisted while respecting self-reliance from the permanently installed legless chair to rehabilitation, a simplified toilet and the wheelchair.

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