Provided is an object information acquiring apparatus which uses a phantom having a base material, an absorber arranged inside the base material, and an identification tag, the apparatus including: a probe which receives an acoustic wave and outputs an electrical signal a unit which reads in information from the identification tag a unit which generates calibration information using an electrical signal based on an acoustic wave propagated from the phantom, and the read information and a unit which acquires object information using the electrical signal based on the acoustic wave propagated from the phantom, wherein the identification tag stores information relating to the phantom.
