To provide a means of training a neck and get rid of stress because it is medically recognized as effective to strengthen the neck as one of the prevention and a treatment of lumbago and because it is not good for the prevention of lumbago and stress to spend a long time in the same posture when moving to a long distance by using a chair for many hours in an airplane, an electric railcar, a bus and an automobile.

Side wings 2L and 2R are arranged on both ends of a headrest 1 of a chair, and these side wings are made at an almost right angle in a 'U shape' in the lateral lengthwise direction of the headrest. In a temple part (the upper side of an ear), a pressing-down angle θ is imparted in the upward direction to rightly keep a posture when pressing down a palm and the temple part.