PROBLEM TO BE SOLVED: To keep a radiation conversion panel flat in consideration of a temperature change of the radiation conversion panel (secure flatness of radiation conversion panel).SOLUTION: A radiation image photographing apparatus (20A) constituting a radiation image photographing system includes: a radiation conversion panel (92) for converting radiation (16) into a radiation image and an external force action section (218) for being stacked on the radiation conversion panel (92) and making an external force act on the radiation conversion panel (92).COPYRIGHT: (C)2012,JPO&INPIT【課題】放射線変換パネルの温度変化を考慮しつつ、該放射線変換パネルを平坦に維持する(放射線変換パネルの平面性を確保する)。【解決手段】放射線画像撮影システムを構成する放射線画像撮影装置(20A)は、放射線(16)を放射線画像に変換する放射線変換パネル(92)と、前記放射線変換パネル(92)に積層され且つ該放射線変換パネル(92)に外力を作用させる外力作用部(218)とを有する。【選択図】図5