PROBLEM TO BE SOLVED: To provide a microwave therapeutic device capable of performing hyperthermic treatment with excellent heating efficiency in a relaxed state without the patient minding the position of an antenna and reducing an erroneous operation due to unexpected radiation on portions other than an affected part to be treated or a radio wave hindrance on another electrical device.SOLUTION: A microwave therapeutic device comprises: an antenna including an attachment having antenna fixing means to be fixed on the affected part of a patient and radiant efficiency improving means for reducing the microwave to be radiated from the antenna to portions other than the affected part so that the affected part can be efficiently treated.COPYRIGHT: (C)2015,JPO&INPIT【課題】患者がアンテナの位置を気にせずリラックスした状態で加熱効率の良い温熱治療をすることができ、さらに治療する患部以外への予期しない放射や他の電気機器への電波障害による誤作動を軽減する。【解決手段】前記患者の前記患部に固定するアンテナ固定手段を有するアタッチメントを前記アンテナに設け、前記アンテナから前記患部以外に放射される前記マイクロ波を減らし前記患部を効率良く治療できるようにした放射効率改善手段を設ける。【選択図】図1