To provide an oral cavity washer that is readily portable, allows for oral cavity care easily outside the home, solves problems with sanitation and maintenance and further reduces fluid to facilitate washing therewith.SOLUTION: An oral cavity washer 1 includes a simple manual compression type pump for oral cavity care which has a simple structure where a liquid storage chamber 3 inside the pump and an inlet/outlet tip 5 of a nozzle are linearly communicated. The manual compression type pump is compact and see-through inside of the oral cavity washer and capable of repeatedly washing an oral cavity with a reduced amount of liquid.SELECTED DRAWING: Figure 1【課題】手軽に持ち運べて、外出先でも簡単に口腔内のケアができ、衛生上やメンテナンス上の問題が解決され、より少量の液体で洗浄を簡易にする。【解決手段】口腔内のケアをする簡易な手動圧縮式ポンプの口腔洗浄器１において、ポンプ内の液体の貯留室３とノズルの先端出入口５までを直線的に通じる簡単な構造とし、口腔洗浄器内が透視可能な小型でコンパクトの手動圧縮式ポンプで、口腔内を少量の液体で繰り返し洗浄をする。【選択図】図１
