A tomosynthesis imaging apparatus includes: a radiation detector having an imaging surface that detects radiation transmitted through an object and captures a projection image of the object； a radiation source that has a plurality of radiation tubes which emit the radiation to the imaging surface at different irradiation angles and selectively irradiates the object with the radiation from each of the plurality of radiation tubes； and a radiation source control unit that performs focal position control for switching between positions of focuses where the radiation is emitted for at least one of the plurality of radiation tubes to change the radiation irradiation angle of the radiation tube with respect to the imaging surface.
