To provide an applicator device for an endoscope capable of smoothly performing endoscope treatment.SOLUTION: An applicator device 1 for an endoscope includes an applicator 42 attachable to and detachable from an insertion part 16 of an endoscope 4 to be inserted into a body cavity. The applicator 42 includes a light emitting element 64 for irradiation with an excitation light for exciting a photosensitive substance administered to an affected part of a biological tissue in the body cavity to act.SELECTED DRAWING: Figure 3【課題】内視鏡治療を円滑に行うことができる内視鏡用アプリケータ装置を提供する。【解決手段】内視鏡用アプリケータ装置１は、体腔内に挿入される内視鏡４の挿入部１６に着脱可能なアプリケータ４２を含み、アプリケータ４２は、体腔内の生体組織の患部に投与した光感受性物質を励起して作用させるための励起光を照射する発光素子６４を備える。【選択図】図３
