It is essential for elderly people to walk by themselves to keep their independence in their daily lives. support their walking, we have developed an electrically assisted walking support device capable of meeting individual use's assistance requirement. Because the walking ability differs person by person, it is necessary to tune the control parameters of the device suitable to individual walking capability. To achieve this, auto-tuning technology that automatically adjusts control parameters such as virtual inertia or viscous resistance was developed and tested by a patient who can hardly walk without help. Test results showed that the electrically assisted walking support device provides high adaptability to elderly people for their mobility.