Anvils (200) comprise temperature adjustment mechanisms (262) provided with heat generation bodies which generate heat. The anvils (200) also comprise heat transfer sections (261) for transferring the heat generated from the temperature adjustment mechanisms (262) to a rotating drum (110). The anvils (200) further comprise temperature sensors (270) for detecting the temperature of anvil mounting sections (112a) of the rotating drum (110), the anvil mounting sections (112a) being those to which the anvils (200) are provided. An ultrasonic joining device (100) is provided, although not shown, with a control unit for controlling the temperature of heating of the rotating drum (110) by the temperature adjustment mechanisms (260). The control unit controls the amount of heat generation by the heat generation bodies (262) on the basis of the result of detection by the temperature sensors (270). The temperature adjustment mechanisms (260) are each provided to each anvil (200).
