A casing (9) having a plurality of vent holes (11, 11) for releasing the gas containing the components of the drug (d), a chemical holding part (2) for holding the drug (d) inside the casing (9), a gas sending means (3) for aeration of gas, and a plurality of vent holes (11, 11), (11) a chemical substance release device (1) characterized in that an air supply direction switching means (5) for switching the air supply direction of the air sending means (3) is provided so as to feed gas toward a specific vent hole (11).薬剤(D)の成分を含有する気体を放出する複数の通気孔(11,11)を有する筺体(9)と、筺体(9)の内部で薬剤(D)を保持する薬剤保持部(2)と、気体を送気する送気手段(3)と、複数の通気孔(11,11)のうち特定の通気孔(11)に向かって気体を送気するように、送気手段(3)の送気方向を切り替える送気方向切替手段(5)と、を備えることを特徴とする薬剤成分放出装置(1)。
