PROBLEM TO BE SOLVED: To provide an oral cavity cleaning device that allows a body unit to be efficiently cleaned.SOLUTION: An oral cavity cleaning device 1 includes: a body unit 10 including a tank 70 for storing cleaning liquid, a pump for discharging the cleaning liquid stored in the tank 70, and a first case 21 in which a plurality of parts 22 are connected so as to be capable of housing the pump； a tube connected to the body unit 10 so that the discharged cleaning liquid flows； and a cleaning unit connected to the tube so as to be capable of discharging the cleaning liquid. The oral cavity cleaning device 1 also includes a seal structure 120 including a first seal part 121 for sealing joints 131A-131C between the plurality of parts 22 in an outer shell of the first case 21, and a second seal part 122 for sealing joints 132A-132C between the first case 21 and an operation part 50.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2020,JPO&INPIT【課題】本体ユニットを効率的に洗浄できる口腔洗浄装置を提供する。【解決手段】口腔洗浄装置１は洗浄液を貯留するタンク７０、タンク７０に貯留される洗浄液を吐出するポンプ、および、ポンプを収容できるように複数のパーツ２２が結合された第１ケース２１を含む本体ユニット１０と、吐出された洗浄液が流れるように本体ユニット１０と接続されるチューブと、洗浄液を吐出できるようにチューブと接続される洗浄ユニットとを含む。口腔洗浄装置１は第１ケース２１の外郭における複数のパーツ２２同士の継ぎ目１３１Ａ～１３１Ｃをシールする第１シール部１２１、および、第１ケース２１と操作部５０との継ぎ目１３２Ａ～１３２Ｃをシールする第２シール部１２２を含むシール構造１２０をさらに含む。【選択図】図９
