An object information acquiring apparatus disclosed by this specification includes a detector configured to detect a photoacoustic wave generated from an object on which light is irradiated from a light source, a generator configured to generate, using the photoacoustic wave, an image indicating characteristic information in a photographing region in the object, an acquirer configured to acquire information concerning quantitativity of a measurement value of the photoacoustic wave in the photographing region, and an extractor configured to extract a region having quantitativity in the image on the basis of the information concerning quantitativity.
