The assistance device 1 is provided so as to be movable on the base 10, the base 10, and the standing device or the seating by moving the support device 50 with respect to the base 10. A moving device 57 that performs an operation, a load detection device 60 that is provided in the support device 50 and detects a load that the support device 50 receives from the person being assisted M, and a control device 80 that controls the moving device 57 are provided. Then, the control device 80 stops the standing operation or the seating operation during the operation based on the load value detected by the load detection device.介助装置1は、基台10と、基台10に移動可能に設けられ、被介助者Mを支持する支持装置50と、支持装置50を基台10に対して移動させることで起立動作または着座動作を行う移動装置57と、支持装置50に設けられ、支持装置50が被介助者Mから受ける荷重を検出する荷重検出装置60と、移動装置57を制御する制御装置80と、を備える。そして、制御装置80は荷重検出装置によって検出された荷重値に基づき、動作中の起立動作または着座動作を停止する。