PROBLEM TO BE SOLVED: To prevent contamination by microorganisms derived from the outside of an apparatus in a reagent container storage. An automatic analyzer provides an ultraviolet ray to a reagent container storage that holds a reagent container, a reagent disk that houses the reagent container and transports the reagent container to a desired position in the reagent container storage, and a loading system for the reagent disk and the reagent container. A sterilization unit 901 and the like having an irradiation unit 902 that irradiates the irradiation unit, a control unit 903 that controls the irradiation unit, a drive battery 904, and a mechanical switch 905 are provided, and the sterilization unit 901 is used to prevent contamination in the sample container storage. To do. [Selection diagram] FIG. 9【課題】試薬容器保管庫内における装置外部由来の微生物によるコンタミネーションを未然に防ぐ。【解決手段】自動分析装置は、試薬容器を保持する試薬容器保管庫と、試薬容器を収容し、試薬容器保管庫の所望位置まで輸送する試薬ディスクと、試薬ディスクと試薬容器の装填システムに紫外線を照射する照射部９０２と照射部を制御する制御部９０３と駆動用バッテリー９０４とメカスイッチ９０５を有する殺菌ユニット９０１等を備え、殺菌ユニット９０１を用いて、試料容器保管庫内のコンタミネーションを防止する。【選択図】図９
