PROBLEM TO BE SOLVED: To provide a radiation image photographing apparatus capable of preventing line defects from appearing continuously on multiple scan lines when the apparatus itself detects, for example, a start of applying radiation.SOLUTION: Control means 22 of a radiation image photographing apparatus 1 performs, at the next time after an ON-voltage is applied to a scan line 5 before radiation image photographing, reset processing for each radiation detection element 7 by sequentially applying an ON-voltage to each scan line 5 other than scan lines 5 adjacent to the scan line 5 on a detector P stops the reset processing when the start of applying radiation is detected on the basis of a current value output from current detection means 43 moves to an electric charge accumulation mode by applying an OFF-voltage to each scan line 5 reads, after applying radiation finishes, image data D from each radiation detection element 7 by sequentially applying an ON-voltage to each scan line 5 and stores each image data D in storage means 40.
