PROBLEM TO BE SOLVED: To provide an oral cavity washing device improved in convenience.SOLUTION: The oral cavity washing device includes a nozzle 30. The nozzle 30 includes an opening part 33 for discharging washing liquid, and an opening outer-peripheral part 34 surrounding the opening part 33. The opening outer-peripheral part 34 has a longitudinal direction DL and a transverse direction DS. The opening part 33 has a longitudinal dimension SL in the longitudinal direction DL, and a transverse dimension SS in the transverse direction DS. The longitudinal dimension SL exists ranging from one end side to the other end side of the opening outer-peripheral part 34.COPYRIGHT: (C)2015,JPO&INPIT【課題】利便性を向上させた口腔洗浄装置を提供する。【解決手段】口腔洗浄装置は、ノズル30を有し、ノズル30は、洗浄液を吐出する開口部33と、開口部33を囲む開口外周部34とを有し、開口外周部34は、長手方向DLと短手方向DSとを有し、開口部33は、長手方向DLにおける長手寸法SLと、短手方向DSにおける短手寸法SSとを有し、長手寸法SLは、開口外周部34の一方の端側から他方の端側に渡って存在している。【選択図】図2
