A thermotherapy device includes a therapy unit (2) with housing having sidewalls surrounding a lying surface, a support device (8) that supports the therapy unit (2) and a heating device (7) for heating an area of the surrounded lying surface. The housing of the therapy unit (2) is open at the bottom. The support device (8) has a base wall arrangement (10) fixedly connected thereto which completes and locks the housing open at the bottom of the therapy unit to form a housing closed off at the bottom in the closed position of the therapy unit. The therapy unit (2) is mounted pivotably on one side in relation the base wall arrangement (10). The therapy unit (2) is pivotable between the closed position with the housing closed and an open position remote from the base wall arrangement, in which position the components in an interior of the housing are accessible.
