An ultrasonic diagnostic apparatus includes a structure for adjusting the positional relationship between an ultrasonic transducer and a blood vessel for measuring an elasticity characteristic. The apparatus includes an ultrasonic probe including a transducer for transmitting an ultrasonic wave and receiving the ultrasonic wave reflected by a tissue of a biological body and a driving device for physically moving the transducer. For measuring the elasticity characteristic of the blood vessel, the driving device moves the transducer based on a control signal to change at least one of a direction and a position at which the ultrasonic wave is to be transmitted. A determination section specifies a position of the transducer at which the reflection intensity is maximum based on intensity information representing an intensity of the reflected wave. A calculation section calculates the elasticity characteristic of the blood vessel at the specified position.
