A portable ultrasonic diagnostic apparatus has an ultrasonic probe, and a main body including a display unit provided on a front surface of the main body. An input device is provided at a rear surface of the main body to receive user command information from a user, which allows the user to operate the portable ultrasonic diagnostic apparatus with a hand that is gripping the portable ultrasonic diagnostic apparatus. The apparatus may be used by moving the ultrasonic probe in contact with a surface of an object, sending ultrasonic signals from the object surface, receiving reflected ultrasonic signals from the object, and converting the ultrasonic signals into electrical signals.
