Abstract: An ultrasonic diagnosing apparatus includes a main body, an ultrasonic probe with a a cable, an expansive support portion, a horizontal arm, a table, and a lever, and a display unit. One end of the support portion is attached to the main body. One end of the horizontal arm is attached to the other end of the support portion. The horizontal arm includes a rotating mechanism for horizontally rotating about the support portion and a mechanism for locking and unlocking the rotating mechanism. A portion of the table is attached to the other end of the horizontal arm. The table includes a pivot mechanism for horizontally pivoting about the horizontal arm and a mechanism for locking and unlocking the pivot mechanism. The lever is arranged on the table so as to bias the locking and unlocking mechanism. The display unit is arranged on the table through a mechanism for allowing it to be tilted.