PROBLEM TO BE SOLVED: To provide a joint appliance excellent in wear feeling, hard to slip off, and having high practicability to make a function as an appliance efficiently act by fixing three points of a portion of the body.SOLUTION: A joint appliance 10 includes: an appliance body 12 fixed to the periphery of the joint of a wearer and three air bags 14, 16 and 18 attached to the inner surface of the appliance body 12, capable of adjusting an air pressure inside the bag, and compressing three points including one point making a compression force act in a prescribed direction in an installation part, and two points separated so as to sandwich the one point, and making a compression force act in a direction opposite to the one point.
