An electromagnetic induction heating unit and air conditioning apparatus are provided whereby the responsiveness of temperature detection can be enhanced even when the temperature of the refrigerant tube varies sharply in electromagnetic induction heating. The electromagnetic induction heating unit (6) heats a refrigerant tube (F) whose external surface is composed of SUS tubing (F2), and the electromagnetic induction heating unit (6) is provided with a coil (68) and a fuse (15). The coil (68) is disposed in the vicinity of the refrigerant tube (F). The fuse (15) is in contact with the external surface of the refrigerant tube (F), and the surface of the fuse (15) in contact with the refrigerant tube (F) has substantially the same shape as the contacted portion of the external surface of the refrigerant tube (F).