PROBLEM TO BE SOLVED: To provide a microwave heating device having an excellent antibacterial effect, which can suitably obtain a denture capable of maintaining the antibacterial effect even when a mastication act continues.SOLUTION: A microwave heating device 1 comprises: a rectangular parallelepiped device body (an exterior part) 2 a heating chamber 5 provided at a substantially central part of the device body 2, in which a denture 4 is disposed in a state of being immersed in a room-temperature aqueous solution of silver 3 a pair of upper and lower microwave generators 6a, 6b provided at the upper part and lower part of the heating chamber 5, which supplies microwave from both upper and lower parts into the heating chamber 5 and heats up the denture 4 as well as the aqueous solution of silver 3 a temperature sensor 7 for detecting a temperature of the denture 4 or the aqueous solution of silver 3 and a control unit for feeding back the detected temperature by the temperature sensor 7 and controlling the pair of upper and lower microwave generators 6a, 6b so that the temperature of the denture 4 or the aqueous solution of silver 3 becomes lower than a softening temperature of the denture 4.COPYRIGHT: (C)2015,JPO&INPIT【課題】 優れた抗菌効果を有し、かつ、咀嚼行為が連続しても抗菌効果を持続することができる義歯を得るのに好適なマイクロ波加熱装置を提供する。【解決手段】 マイクロ波加熱装置1は、直方体状の装置本体(外装部)2と、装置本体2内の略中央部に設けられ、常温の銀水溶液3中に浸漬された状態で義歯4が配置される加熱チャンバ5と、加熱チャンバ5の上下に設けられ、当該加熱チャンバ5内に上下双方からマイクロ波を供給して、義歯4を銀水溶液3と共に加熱する上下一対のマイクロ波発生器6a、6bと、義歯4又は銀水溶液3の温度を検出する温度センサ7と、温度センサ7による検出温度をフィードバックして、義歯4又は銀水溶液3の温度が義歯4の軟化温度よりも低い温度となるように上下一対のマイクロ波発生器6a、6bを制御する制御部と、を備えている。【選択図】 図4