Disclosed is a photoacoustic wave diagnosing apparatus including a holding unit that presses and holds an object during imaging a photoacoustic measuring unit that measures information on the photoacoustic wave of the object pressed by the holding unit an optical coefficient acquiring unit that acquires an optical coefficient based on the object in the pressed state and a reconstruction unit that performs image reconstruction based on the information on a photoacoustic wave signal measured by the photoacoustic measuring unit and the optical coefficient acquired by the optical coefficient acquiring unit.
