PROBLEM TO BE SOLVED: To provide a wireless power feeding type light irradiation device for a photodynamic treatment capable of treating an internal disease such as liver cancer and pancreas cancer using light with a low degree of invasion to a living body.SOLUTION: There is provided a wireless power feeding type light irradiation device 41 for irradiating light from inside a living body to a part of the living body, which includes a substrate 1, a light emitting element 2, and a power receiving part 4, and in which the light emitting element includes a semiconductor disposed between a pair of electrodes 5, the pair of electrodes being electrically connected to the power receiving part. There is also provided a light irradiation device and a light irradiation method.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2019,JPO&INPIT【課題】光を用いて肝臓ガン、膵臓ガンなどの内部疾患を治療でき、生体に対する侵襲度が低い、光線力学的療法用ワイヤレス給電式光照射デバイスの提供。【解決手段】基板1、発光素子2および受電部4を有し、発光素子が一対の電極5の間に配置された半導体を含み、一対の電極が受電部と電気的に接続され、生体内から生体の一部に照射させる用途である、ワイヤレス給電式光照射デバイス41;光照射装置および光照射方法。【選択図】図1
