To provide a volatilization device in which the decrease over time in the volatilization amount of chemical can be suppressed for a long period of time.SOLUTION: A volatilization device 10 of the present invention has a cylindrical peripheral wall, a bottom wall for closing one end of the peripheral wall, and volatilization pores for volatilizing a chemical, and has a cover body detachably provided at the other end of the peripheral wall. The peripheral wall has a split part for splitting the peripheral wall between one end and the other end.SELECTED DRAWING: Figure 1【課題】薬剤の揮散量の経時的な減少を長期にわたって抑制することができる揮散装置を提供する。【解決手段】本発明の揮散装置１０は、筒状の周壁と、周壁の一端を塞ぐ底壁と、薬剤を揮散させる揮散孔を有し、周壁の他端に着脱可能に設けた蓋体と、を有する。周壁は、一端と他端の間で当該周壁を分割する分割部分を有する。【選択図】図１
