A radiographic image detection device includes: an image pickup unit with plural radiation detection portions arrayed in a two-dimensional form and detect radiation, and that captures a radiographic image； a radiographic image generating unit having plural analog signal generating units that generate analog signals corresponding to radiation doses； a conversion unit that converts the generated analog signals into digital signals； a judging unit that judges whether or not level fluctuations of the generated analog signals are within a predetermined threshold value； and a control unit that controls the conversion unit such that an analog signal, at which it is judged that the level fluctuation is within the predetermined threshold value, is converted into a digital signal, and that controls the conversion unit such that an analog signal, at which it is judged that the level fluctuation has exceeded the predetermined threshold value, is not converted into a digital signal.
