There is used an object information acquiring apparatus including an irradiating unit that irradiates an object with light, an irradiation position controlling unit that controls an irradiation position for irradiating the object with the light, a probe that receives an acoustic wave generated when the object is irradiated with the light from the irradiating unit, at a position opposing the irradiating unit across the object, and outputs an acoustic wave signal, a probe controlling unit that controls the probe, a control processor that controls at least one of the irradiation position controlling unit and the probe controlling unit such that the light does not enter the probe directly without going through the object, and a constructing unit that constructs characteristic information.
