PROBLEM TO BE SOLVED: To provide a drug injection device capable of efficiently applying a drug to a wide area inside a body cavity such as vagina or anus. Kind Code: A1 A drug injection device for injecting a fluid drug into a body, which is formed inside a long insertion part to be inserted into the body, a storage part in which the fluid drug is stored, and the insertion part. And a drug channel part through which the fluid drug extruded from the storage part is guided, and the drug channel part is formed along the longitudinal direction of the insertion part, and has the elongated shape. The insertion portion includes a plurality of drug ejection holes that communicate the drug flow passage portion with the outside, and the hole diameter of each drug ejection hole is gradually increased in the downward direction of the flowable drug flowing through the drug flow passage portion. Drug injection device characterized in that it becomes larger in size. [Selection diagram] Figure 2【課題】膣や肛門といった体腔の内側の広い範囲に薬剤を効率良く塗布することができる薬剤注入器具を提供する。【解決手段】体内に流動性薬剤を注入する薬剤注入器具であって、体内に挿入される長尺状の挿入部と、流動性薬剤が貯留される貯留部と、前記挿入部の内部に形成され、前記貯留部から押し出された流動性薬剤が導かれる薬剤流路部とを備えており、前記薬剤流路部は前記挿入部の長手方向に沿って形成されており、前記長尺状の挿入部は、前記薬剤流路部と外部とを連通する複数の薬剤吐出孔を備え、前記薬剤流路部を流通する流動性薬剤の流下方向に向かうに従い、前記各薬剤吐出孔の孔径が段階的に大きくなることを特徴とする薬剤注入器具。【選択図】図２
