An ultrasonic diagnosis method of one aspect of the presently disclosed subject matter: transmitting ultrasonic waves to an object through an ultrasonic probe including a plurality of ultrasonic transducers, and outputting ultrasonic detection signals after receiving the ultrasonic waves reflected by the object calculating at least one of a reception time and a reception wave at each of respective elements corresponding to two or more lattice points at different depths in the object with respect to the ultrasonic probe and calculating a local sound velocity which is a sound velocity in a local region, using calculated one of the reception time and the reception wave.
