An ultrasound diagnostic apparatus includes an ultrasound probe, a transmitter, a receiver, a signal intensity adjuster and an image data generator. The ultrasound probe transmits transmission ultrasound to an examination object, receives echo from the examination object and generates an echo signal. The transmitter generates a drive signal and outputs the drive signal to the ultrasound probe to cause the ultrasound probe to generate the transmission ultrasound. The receiver receives the echo signal from the ultrasound probe. The signal intensity adjuster adjusts signal intensity of the echo signal to signal intensity having a flat frequency range. The image data generator generates ultrasound image data from the echo signal having the adjusted signal intensity.
