To provide an X-ray image detector device that is achieved at low cost and has high resolution.

The X-ray image detector includes an image detection unit 4. A plurality of row selection lines have a row selection line A12 arranged above a pixel group disposed in an arbitrary row and a row selection line B14 arranged below the pixel group, the row selection line A12 is connected only to pixels 22a in odd columns in a pixel body unit 24, the row selection line B14 is connected only to pixels 22b of even columns in the pixel group, and adjacent pixels 22a and 22b are connected to the same signal line 16.