A portable radiographic capturing apparatus includes: a detecting unit provided with a two-dimensional array of radiation detecting elements accumulating charges in proportion to a dose of radiation； and a control unit which controls accumulation of the charges by the radiation detecting elements and reading of the accumulated charges therefrom, the charges being in proportion to the dose of radiation emitted as pulsed radiation from a radiation source and transmitted through a subject, to generate plural frame images of the subject, wherein the control unit obtains waveform information on the emitted radiation by causing at least some of the radiation detecting elements to accumulate the charges in proportion to the radiation preliminarily emitted from the radiation source for adjustment and by reading the accumulated charges, and adjusts a control condition for generation of the frame images of the subject on the basis of the obtained waveform information.
