An ankle brace for comfortably supporting an ankle of a wearer by inhibiting motion between a foot and lower leg of the wearer. is stored and kept is provided with a pressure sensor, transmission means for transmitting data on the pressure, a controller that controls the operation of them, and a battery serving as a power source of the above elements. The hollow treat holder may have a variety of shapes such as straight, triangular, U-shaped, spheroidal, cubic, and L-shaped.