A locking structure of an atomized drug delivery device includes a first casing, a second casing, a screw, and a fastener. The first housing has a latching portion and a buckle slot, and the buckle slot is adjacent and formed on one side of the latching portion. The second casing is rotatably connected to the first casing, thereby rotating relative to the first casing along a rotation axis. The screw is pivoted on the second casing and is parallel to the aforementioned rotation axis, and the screw rotates along the central axis of the body along with the relative rotation of the second casing and the first casing. The fastener is connected to and driven by the screw, and the fastener protrudes toward the resisting portion of the first casing. The fastener is used for resisting the resisting portion to generate a displacement so as to be located in the latching groove after passing through the resisting portion. Thus, the present invention uses a screw and a fastener to form a locking mechanism, which can reduce structural complexity and manufacturing costs, and prevent the atomized drug delivery device from being locked by mistake.一種霧化給藥裝置之鎖定結構，包含第一殼體、第二殼體、螺桿以及扣件。第一殼體具有抵掣部與扣槽，扣槽鄰接並形成於抵掣部一側。第二殼體可旋轉地連接第一殼體，藉而相對第一殼體沿一旋轉軸線旋轉。螺桿樞設於第二殼體並平行於前述旋轉軸線，且螺桿隨第二殼體與第一殼體的相對旋轉而沿自體中心軸旋轉。扣件連接螺桿而受其驅動，且扣件朝向第一殼體之抵掣部凸伸。扣件供抵掣部抵掣以產生位移，以於通過抵掣部後而限位於扣槽。藉此，本發明以螺桿及扣件構成鎖定機制，可降低結構複雜性與製造成本較低，並防止霧化給藥裝置被錯誤地鎖定。
