An ultrasonic diagnostic apparatus 10 comprises an ultrasonic transmitter unit 13,15, an ultrasonic receiving unit 13,17, an extracting unit 17, a filter unit and an adder unit 19c,21c. The ultrasonic transmitter unit 13,15 transmits ultrasonic varied at least one of phase and amplitude to an object. The ultrasonic receiving unit 13,17 receives ultrasonic echoes. The extracting unit 17 extracts a first nonlinear signal obtained through modulating the amplitude and a second linear signal obtained through modulating the phase from common ultrasonic echoes. The filter unit processes a filter process to the first nonlinear signal and the second nonlinear signal with at least two deferent sets of a middle frequency and a width of a band. The adder unit 19c,21c performs weighted addition to signals obtained through the first nonlinear signal and the second nonlinear signal according to a depth of the object.
