PROBLEM TO BE SOLVED: To provide a radiation ray image photographing system which can easily calculate a delay time on a radiation ray radiation device.SOLUTION: A radiation ray image photographing system 100 comprises: a radiation ray image photographing device 1； radiation ray radiation devices 50, 51 for notifying a user of a fact that a radiation ray is radiated, by notification means 51a； an exposure switch 53 to which two stages of operations can be executed, which transmits a start signal when an operation of the first stage is executed, and transmits a radiation start signal when an operation of the second stage is executed； a signal transmission/reception device 40 for transmitting the start signal to the radiation ray radiation devices 50, 51 when receiving the start signal transmitted from the exposure switch 53； and delay time calculation means 1, 40, 60 for calculating a difference between a time T1 when the signal transmission/reception device 40 received the start signal from the exposure switch 53, and a time Tr when radiation start of the radiation ray is notified by the notification means 51a of the radiation ray radiation devices 50, 51, as a delay time ΔT.SELECTED DRAWING: Figure 3【課題】放射線照射装置における遅延時間を簡便に割り出すことが可能な放射線画像撮影システムを提供する。【解決手段】放射線画像撮影システム１００は、放射線画像撮影装置１と、放射線を照射していることを報知手段５１ａにより報知する放射線照射装置５０、５１と、２段の操作が可能で、１段目の操作が行われると起動信号を発信し、２段目の操作が行われると照射開始信号を発信する曝射スイッチ５３と、曝射スイッチ５３から発信された起動信号を受信すると起動信号を放射線照射装置５０、５１に送信する信号送受信装置４０と、信号送受信装置４０が曝射スイッチ５３から起動信号を受信した時刻Ｔ１と、放射線照射装置５０、５１の報知手段５１ａにより放射線の照射開始が報知された時刻Ｔｒとの差分を遅延時間ΔＴとして算出する遅延時間算出手段１、４０、６０とを備える。【選択図】図３
