An imaging apparatus for tomographically imaging an imaging object carried in a carrier having an optically transparent wall surface, the imaging apparatus comprising: a light source which emits low-coherence light; an imaging unit which causes one branch light obtained by dividing light from the light source into a plurality of optical paths to be incident as illumination light on the imaging object via an object optical system, detects interference light generated by an interference of signal light reflected from the imaging object and incident on the object optical system and reference light based on another branch light and outputs an interference signal corresponding to detected interference light; and a signal processor which obtains a reflected light intensity distribution of the imaging object along an incident direction of the illumination light based on the interference signal, wherein the object optical system includes an objective lens and a light regulator, characterized in that the objective lens is arranged to face the wall surface, converges the illumination light to the imaging object via the wall surface and collects the signal light from the imaging object emitted via the wall surface, the light regulator is arranged on an optical path of the illumination light on a side opposite to the imaging object across the objective lens and has a light regulating surface formed with a transmission pattern in which a high transmission part for transmitting the illumination light at a relatively high transmittance and a low transmission part having a lower transmittance to the illumination light than the high transmission part are regularly arranged, and the transmission pattern is rotationally symmetric with respect to an optical axis of the objective lens and a point located at a position point-symmetric with an arbitrary point in the high transmission part with respect to a point where the optical axis of the objective lens intersects with the light regulating surface is included in the low transmission part. a light source which emits low-coherence light; an imaging unit which causes one branch light obtained by dividing light from the light source into a plurality of optical paths to be incident as illumination light on the imaging object via an object optical system, detects interference light generated by an interference of signal light reflected from the imaging object and incident on the object optical system and reference light based on another branch light and outputs an interference signal corresponding to detected interference light; and a signal processor which obtains a reflected light intensity distribution of the imaging object along an incident direction of the illumination light based on the interference signal, wherein the object optical system includes an objective lens and a light regulator, characterized in that the objective lens is arranged to face the wall surface, converges the illumination light to the imaging object via the wall surface and collects the signal light from the imaging object emitted via the wall surface, the light regulator is arranged on an optical path of the illumination light on a side opposite to the imaging object across the objective lens and has a light regulating surface formed with a transmission pattern in which a high transmission part for transmitting the illumination light at a relatively high transmittance and a low transmission part having a lower transmittance to the illumination light than the high transmission part are regularly arranged, and the transmission pattern is rotationally symmetric with respect to an optical axis of the objective lens and a point located at a position point-symmetric with an arbitrary point in the high transmission part with respect to a point where the optical axis of the objective lens intersects with the light regulating surface is included in the low transmission part.