PROBLEM TO BE SOLVED: To provide a portable interdental brush having a washing liquid in a sealed state accommodated therein to be conveniently carried, guaranteeing a user's activity while being carried, its washing liquid tube's assembly protrusion unit being easily opened/closed when the portable interdental brush is used to enable a discharging control of the washing liquid, having a simple structure and a low production cost but capable of easily and conveniently used.SOLUTION: A portable interdental brush is provided, comprising: a washing liquid tube having a washing liquid accommodated therein to be conveniently carried, having an assembly protrusion unit formed to discharge the washing liquid； a tube cover which has an assembly hole formed at a lower part thereof with the assembly protrusion unit of the washing liquid tube to be inserted and assembled to the assembly hole, and which has a fixing hole with a larger diameter than the assembly hole formed above the assembly hole, a brush fixing unit of which one end part a brush is fixed being inserted and fixed to the fixing hole, the tube cover to be assembled to the assembly protrusion unit of the washing liquid tube； and the brush fixing unit which is inserted and fixed inside the fixing hole of the tube cover, of which lower end part a tight contact end part is formed to be detachably brought into a tight contact with the assembly protrusion unit, and of which other end part the brush is fixed.SELECTED DRAWING: Figure 12【課題】洗浄液が密封状態で収納されて携帯が容易になり、携帯しながらも活動性が保証され、使用時には洗浄液チューブの組立突出部が容易に開閉されて洗浄液の流出の制御が可能になり、構造が簡単で製造コストが安価ながら容易に使うことができ、使用が便利な携帯用歯間ブラシを提供する。【解決手段】携帯用歯間ブラシであって、洗浄液が収納されて携帯が容易になり、洗浄液が流出される組立突出部が形成された洗浄液チューブと、前記洗浄液チューブの組立突出部が挿入されて組み立てられる組立孔が下部に形成され、前記組立孔の上方に組立孔より直径が大きく、ブラシが一端部に固定されたブラシ固定部が挿入固定される固定孔が形成され、前記洗浄液チューブの組立突出部に組み立てられるチューブ蓋と、前記チューブ蓋の固定孔内に挿入されて固定され、下端部には密着端部が形成されて前記組立突出部と着脱可能に密着され、他端部にはブラシが固定されたブラシ固定部を含む。【選択図】図１２
