DIAGNOSIS APPARATUS

A diagnosis apparatus according to an embodiment of the disclosure includes a recognition unit and a diagnosis unit. The recognition unit is configured to recognize an environment outside a vehicle. The diagnosis unit is configured to detect a reaction time of a driver to a recognition target recognized by the recognition unit, based on a driving operation timing in a driving operation unit configured to receive a driving operation of the driver related to traveling of the vehicle, and diagnose a health state of the driver based on the reaction time.