An object information acquiring apparatus includes: an optical image acquiring unit which acquires an optical image obtained by optically capturing an image of an object on which a marker is arranged； a photoacoustic image acquiring unit which acquires a photoacoustic image derived from a photoacoustic wave generated from the object irradiated with light； and a superimposed image generating unit which generates a graphic on the basis of positional information of the marker in the optical image and which generates a superimposed image by superimposing the graphic onto the photoacoustic image.
