An induction heating apparatus, comprising: a top plate for placing an object to be heated thereon; a heating coil adapted to generate an induction magnetic field for heating the object to be heated; a control portion adapted to control a high-frequency electric current applied to the heating coil for heating the object to be heated; and an infrared-ray detection portion which is adapted to detect an infrared ray radiated according to the temperature of the object to be heated and is adapted to output an infrared-ray detection signal according to infrared-ray energy of the detected infrared ray; wherein the infrared-ray detection portion includes an infrared-ray reception portion adapted to output a detection signal, when receiving an infrared ray radiated from the object to be heated, an amplification portion adapted to amplify the detection signal from the infrared-ray reception portion to form an infrared ray detection signal, and a temperature detection portion which is adapted to detect a temperature of the infrared-ray detection portion, wherein the temperature detection portion is further adapted to output the detected temperature to the control portion; characterized in that the control portion includes a correction portion which is adapted to correct the infrared-ray detection signal for forming an infrared-ray real signal by using negative-signal information about a negative signal,_which is superimposed on the infrared-ray detection signal outputted from the infrared-ray detection portion caused by the temperature of the infrared-ray reception portion, and which has a reverse polarity from that of the infrared-ray detection signal, and the negative-signal information being generated in response to the temperature of the infrared-ray reception portion of which the temperature is detected by the temperature detection portion, when the temperature of the infrared-ray reception portion is equal to or higher than a temperature to be detected by the infrared-ray detection portion. a top plate for placing an object to be heated thereon; a heating coil adapted to generate an induction magnetic field for heating the object to be heated; a control portion adapted to control a high-frequency electric current applied to the heating coil for heating the object to be heated; and an infrared-ray detection portion which is adapted to detect an infrared ray radiated according to the temperature of the object to be heated and is adapted to output an infrared-ray detection signal according to infrared-ray energy of the detected infrared ray; wherein the infrared-ray detection portion includes an infrared-ray reception portion adapted to output a detection signal, when receiving an infrared ray radiated from the object to be heated, an amplification portion adapted to amplify the detection signal from the infrared-ray reception portion to form an infrared ray detection signal, and a temperature detection portion which is adapted to detect a temperature of the infrared-ray detection portion, wherein the temperature detection portion is further adapted to output the detected temperature to the control portion; characterized in that the control portion includes a correction portion which is adapted to correct the infrared-ray detection signal for forming an infrared-ray real signal by using negative-signal information about a negative signal,_which is superimposed on the infrared-ray detection signal outputted from the infrared-ray detection portion caused by the temperature of the infrared-ray reception portion, and which has a reverse polarity from that of the infrared-ray detection signal, and the negative-signal information being generated in response to the temperature of the infrared-ray reception portion of which the temperature is detected by the temperature detection portion, when the temperature of the infrared-ray reception portion is equal to or higher than a temperature to be detected by the infrared-ray detection portion.