In general, according to one embodiment, an ultrasonic diagnostic apparatus comprises a plurality of light emission units, a control unit, a plurality of light detection units and a calculation unit. The light emission units are arranged around an ultrasonic transmitting and receiving surface of an ultrasonic probe included by the ultrasonic diagnostic apparatus and emit light including a component of a specific wavelength to the subject, the particular wavelength being included in an absorption wavelength range of a body. The control unit drives a plurality of the light emission units at different frequencies. The plurality of light detection units are arranged around the ultrasonic transmitting and receiving surface and detect the light of the specified wavelength reflected inside the subject. The calculation unit calculates intensity of the light of the specified wavelength at different frequencies.
