PROBLEM TO BE SOLVED: To obtain a sufficient drug volatilization effect in a drug volatilization device including a drug volatilizer having a flexible sheet layer having a volatilization layer and a breaking layer. A container (10) having an opening and a flexible sheet layer (20) attached to the container (10) so as to close the opening are provided, and a medicine container (30) is provided between the container (10) and the flexible sheet layer (20). A drug volatilization device U including the formed drug volatilizer 1 and a pressing member 50 for applying a pressing force to the flexible sheet layer 20. The flexible sheet layer 20 includes a volatilization layer 21 that volatilizes a drug, and a breaking layer 22 that is arranged closer to the container 10 than the volatilization layer 21. The breaking layer 22 has a smaller amount of extension than the volatilization layer 21 when a pressing force for pressing the flexible sheet layer 20 toward the container 10 side is applied to the flexible sheet layer 20 by the pressing member 50. Break. The pressing member 50 continues to contact the volatilization layer 21 after the fracture layer 22 is fractured. [Selection diagram] Fig. 11【課題】揮散層及び破断層を有する可撓性シート層を備える薬剤揮散体を含む薬剤揮散装置において、充分な薬剤揮散効果を得る。【解決手段】開口部を有する容器１０と開口部を閉鎖するように容器１０に取り付けられる可撓性シート層２０とを備え容器１０と可撓性シート層２０との間に薬剤収容部３０が形成される薬剤揮散体１と、可撓性シート層２０に押圧力を加えるための押圧部材５０と、を含む薬剤揮散装置Ｕである。可撓性シート層２０は、薬剤を揮散させる揮散層２１と、揮散層２１よりも容器１０側に配置される破断層２２と、を有する。破断層２２は、押圧部材５０によって可撓性シート層２０を容器１０側へと押圧する押圧力が可撓性シート層２０に対して加えられた場合に、揮散層２１よりも少ない伸長量で破断する。押圧部材５０は、破断層２２の破断後に揮散層２１に接触し続ける。【選択図】図１１
