PROBLEM TO BE SOLVED: To provide a charging system for radiation cassette that enables radiographic imaging instantly at any time.SOLUTION: A charging device 100 for radiation cassette is used to charge battery packs 40 of a radiation cassette having a radiation detector that generates an image signal responsive to radiation transmitted through an object to be examined. The charging device for radiation cassette includes charging parts 4, 5, 6 that charge three battery packs 40 respectively and a control part 3 that obtains information about the remaining charge amount of the battery packs 40 connected to the respective charging parts and controls the charging parts 4, 5, 6 in such a way that a battery pack(s) 40 having a remaining charge amount smaller than a predetermined target value is (are) charged preferentially.【課題】いついかなるときであっても放射線撮影を直ぐに行うことを可能にする放射線カセッテ用充電システムを提供する。【解決手段】被検体を透過した放射線に応じた画像信号を得る放射線検出器を有する放射線カセッテのバッテリパック４０を充電する放射線カセッテ用充電装置１００は、３つのバッテリパック４０の各々を充電する充電部４，５，６と、充電部４，５，６の各々に接続されるバッテリパック４０の残量の情報を取得し、その情報に基づいて、バッテリ残量が予め設定された目標値を下回るバッテリパック４０を優先して充電するよう充電部４，５，６を制御する制御部３とを備える。【選択図】図１
