There is provided a radiation solid state reader having a phosphor absorbing radiation and emitting light and a plurality of pixels arranged in a two-dimensional matrix. Each of the pixels has a photoelectric conversion element for receiving the emitted light and for generating charge and a reading transistor for reading signal from the photoelectric conversion element. The photoelectric conversion element is disposed between the phosphor and the reading transistor. There is also provided a radiation solid state reader having a plurality of pixels arranged in a two dimensional matrix for reading a signal from a direct conversion type sensor absorbing radiation and generating charge. Each of the pixels includes an amplifying circuit for amplifying a signal from the direct conversion type sensor.