A radiographic imaging apparatus in which a radiation source support unit supports a radiation source is adapted to be capable of being quickly carried to a use position in a small radius. A radiographic imaging apparatus includes a leg unit that includes three or more wheel units and is capable of traveling on an apparatus-placement surface by using wheels, a body unit that is held on the leg unit, an arm unit as a radiation source support unit that is connected to the body unit, a radiation source that is mounted on the arm unit, a battery that is received in the body unit and drives the radiation source, and a circuit that is received in the body unit and relates to the drive of the radiation source. The wheel unit is formed of a revolving caster.