An ultrasound diagnosis apparatus can accurately identify a tip position of a puncture needle. The apparatus includes: a transmitter/receiver that transmits at least one ultrasound to a subject, and receives a reflected wave of the ultrasound from the subject a processor that processes data on the received reflected wave to create at least one image of a two-dimensional structure including a depth direction of the subject a display controller that controls a display to display the created image of the two-dimensional structure a position acquirer that acquires an estimated tip position of a puncture needle to be stuck into the subject and a transmission controller that adjusts at least one parameter of a focal length, aperture size and sound-ray density of the ultrasound depending on the acquired estimated tip position, and controls the transmitter/receiver to transmit the ultrasound.
