PROBLEM TO BE SOLVED: To provide a technique by which a denture surface can be sterilized in a wide range without using chemicals.SOLUTION: The denture washing device includes: a container 1 in which cleaning fluid G can be stored； a luminous element 2 which emits ultraviolet rays toward dentures W immersed in the cleaning fluid G in the container 1； and a diffusing part (reflection part 3, bubble generating part 4) which diffusely guides to the dentures at least a part of the ultraviolet rays emitted from the luminous element 2. The denture washing method includes: (a) a step of immersing the dentures W in the cleaning fluid G； (b) a step of emitting the ultraviolet rays toward the dentures W； and (c) a step of diffusely guiding to the dentures W at least a part of the ultraviolet rays.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】薬品を用いずに義歯の表面を広範囲に亘って殺菌することが可能な技術を提供する。【解決手段】義歯洗浄装置は、洗浄液Ｇが溜められる容器１と、当該容器１内で洗浄液Ｇに浸された義歯Ｗへ向けて紫外線を放つ発光素子２と、当該発光素子２から放たれた紫外線の少なくとも一部を散乱して義歯へ導く散乱部（反射部３、バブル発生部４）と、を備える。義歯洗浄方法は、（ａ）洗浄液Ｇに義歯Ｗを浸すステップと、（ｂ）義歯Ｗへ向けて紫外線を放つステップと、（ｃ）紫外線の少なくとも一部を散乱して義歯Ｗへ導くステップと、を含む。【選択図】図１
