PROBLEM TO BE SOLVED: To make a radiation detector assembly last long while securing easiness of return from a standby state by supplying electric power intermittently at standby.SOLUTION: The radiation detector assembly includes: a radiation detection instrument (60) which detects radiation, converts the detected radiation into a charge, and outputs a radiation image data from the converted charge a communication section (94) which communicates with the outside control sections (92, 96B) and a battery (96) which supplies power to a radiation detection instrument, the communication section, and the control sections, wherein the control sections control to supply power from the battery to the communication section intermittently at standby.
