A radiation detection element includes plural hexagonal pixels arrayed in a honeycomb form and having sensor portions that generate charges due to radiation being irradiated. The radiation detection element includes charge accumulating capacitors that accumulate generated charges, and TFT switches for reading-out the charges accumulated at the capacitors. The radiation detection element includes scan lines disposed parallel in a first direction, to which switching signals that control switching of the TFT switches are outputted; and data lines disposed parallel in a second direction intersecting the first direction, to which charges read-out by the TFT switches are outputted. The TFT switches are disposed to be, in the first direction, connected to the data lines from alternately different sides of the data line, and such that an arrangement of source electrodes and drain electrodes of the TFT switches is the same in the first direction.