An anvil 200 has a temperature adjustment mechanism 262 including a heater. The anvil 200 has a heat transmitter 261 transmitting heat generated by the temperature adjustment mechanism 262. The anvil 200 has a temperature sensor 270 detecting a temperature of an anvil attachment portion 112a in which the anvil 200 of rotating drum 110 installed. The ultrasonic joining apparatus 100 includes a controller configured to control a temperature to which the rotating drum 110 should be heated by the temperature adjustment mechanism 262. The controller controls a heat generation amount of the temperature adjustment mechanism 262 on the basis of a detection result by the temperature sensor 270. The temperature adjustment mechanism 262 and the heat transmitter 261 are installed in each of the multiple anvils 200.
