To provide a tricycle chair having a function to assist a healthy person and the elderly who are not confident in walking by themselves so that they can travel for long time even with small muscular strength, and to switch to operation by full automation when it is hard for them to travel by themselves.SOLUTION: The current invention is a tricycle chair to be a wheelchair which has two rear wheels, one front wheel, and is got on from the front and in which it is easy for a user to stand and to travel by itself, which has an electrically-driven assist mode driven by man power and by motor or an automatic travel mode with a signal by remote control operation as a driving source of the motor, and switches the modes.SELECTED DRAWING: Figure 4【課題】自力歩行に自信のない健常者や高齢者が、少ない筋力でも長時間走行する事が出来るようアシストし、自力で走行する事が困難な時に、全自動による運転に切り替える機能を有する三輪車椅子を提供する。【解決手段】本考案は、後輪が2輪で前輪が1輪の前のり車椅子で、立ち上がりが容易で、自力での走行が容易な三輪車椅子において、人力駆動及びモータによる電動アシストモード、またはリモコン操作による信号をモータの駆動源とする自動走行モードを有し、それらのモードを切り替えられる三輪車椅子。【選択図】図4