PURPOSE: A long lasting thermotherapy apparatus is provided to stably maintain a temperature suitable for a human body. CONSTITUTION: A long lasting thermotherapy apparatus comprises a bell(100), a receipt box(200) which is installed in the belt, a hot pack case(300) which is accepted in the receipt box, a hot pack(400) which is inserted into the hot pack case, and an air curtain which covers the hot pack to control contact between hot pack and air. The belt is made of nylon, spandex, and gore-tex and is formed with an elastic unit.본 발명은 지속형 온열치료기에 관한 것으로, 벨트와, 벨트에 구비되는 수납함과, 수납함에 수납되는 핫팩케이스와, 핫팩케이스에 삽입되는 핫팩을 포함하는 것을 특징으로 한다.