Disclosed is an object information acquiring apparatus including: an irradiator configured to emit pulsed light of a plurality of wavelengths different from each other； a receiver configured to receive object signals propagating from the object irradiated with the pulsed light of the plurality of wavelengths and converts the received object signals into a plurality of reception signals； a corrector configured to correct at least any of the plurality of reception signals according to pulse shapes of beams of the pulsed light of the plurality of wavelengths； and an information acquirer configured to acquire spectral information on the object using the plurality of reception signals corrected by the corrector.
