1. An object information acquiring apparatus comprising: an irradiating unit configured to irradiate an object with light; a probe configured to receive an acoustic wave generated from the object irradiated with the light; a generating unit configured to generate an image of an object interior on the basis of the acoustic wave; an imaging region input unit configured to receive an input of a designation of an imaging region, which is a region of the object in which the acoustic wave is received by the probe; a display region input unit configured to receive an input of a designation of a display region, which is a region of the object in which the image generated by the generating unit is displayed; and a display unit configured to display the generated image in the display region.