PROBLEM TO BE SOLVED: To provide a medicine volatilizer, upon being fitted to a container of a cover member, capable of securely engaging a projecting part of the cover member to a recessed part of the container.SOLUTION: Provided is a medicine volatilizer comprising: a container having an opening at the upper part and stored with a medicine； and a cover member clogging the opening. The container has a plurality of recessed parts recessed at the inner part in the radial direction of the opening around the opening. The cover member includes: an upper wall； and a circumferential wall elongating from the peripheral wall of the upper wall to the lower part. In the inner wall face of the circumferential wall, each recessed part is provided with a plurality of projecting parts to be engaged, respectively, and the space of the adjacent recessed parts along the circumferential direction of the opening is provided with a swollen part swollen to the outer part in the radial direction, respectively.SELECTED DRAWING: Figure 16【課題】カバー部材の容器への取付時に、カバー部材の突出部を容器の凹部に対して確実に係合させることができる、薬剤揮散器を提供する。【解決手段】本発明に係る薬剤揮散器は、上部に開口を有し、薬剤が収容される容器と、開口を塞ぐカバー部材と、を備え、容器は、開口の周囲に、当該開口の径方向の内方に凹む複数の凹部を有しており、カバー部材は、上壁と、当該上壁の周縁から下方へ延びる周壁と、を有し、周壁の内壁面には、各凹部に、それぞれ係合する複数の突出部を有しており、開口の周方向に沿って、隣接する凹部の間には、それぞれ、径方向の外方に膨出する膨出部が設けられている。【選択図】図１６
