An ultrasonic diagnosis device, comprising: a display unit (24; 272) that is adapted to display an ultrasonic image; and an arm mechanism (22; 270) that is disposed on a base (20; 276) and is adapted to support the display unit (24; 272), wherein the arm mechanism (22; 270) includes: an arm mechanism main unit that is composed of at least one arm member (46, 50, 52; 280, 284) and at least one pivot mechanism (44, 48, 54); and an attitude correction mechanism that is provided between the arm mechanism main unit and the display unit (24; 272), characterized in that, when an apparent rotation caused by drooping of an end portion of the arm mechanism main unit on the display side is generated in the display unit (24; 272), the attitude correction mechanism is adapted to rotate the display unit (24; 272) in the opposite direction so that the apparent rotation of the display unit (24; 272) can be eliminated, the attitude correction mechanism includes: a rotation shaft that is provided on one of the end portion on the display unit side and the display unit (24; 272); a bearing portion that is provided on the other of the end portion on the display unit side and the display unit (24; 272) and is coupled with the rotation shaft; and a limitation portion (260, 264A) that is adapted to limit a rotation angle range of the display unit (24; 272) about the rotation shaft, the limitation portion (260, 264A) includes: a movable member that is provided on one of the end portion on the display unit side and the display unit (24; 272); and a member that is provided on the other of the end portion on the display unit side and the display unit (24; 272) and is adapted to limit a movable range of the movable member, a center line (268; 288) of the rotation shaft is provided in parallel with a normal line of a display surface of the display unit (24; 272), and the center line (268; 288) of the rotation shaft passes a center line of a tilt shaft provided in the arm mechanism main unit such that the center line (268; 288) of the rotation shaft is orthogonal to the center line of the tilt shaft. a display unit (24; 272) that is adapted to display an ultrasonic image; and an arm mechanism (22; 270) that is disposed on a base (20; 276) and is adapted to support the display unit (24; 272), wherein the arm mechanism (22; 270) includes: an arm mechanism main unit that is composed of at least one arm member (46, 50, 52; 280, 284) and at least one pivot mechanism (44, 48, 54); and an attitude correction mechanism that is provided between the arm mechanism main unit and the display unit (24; 272), an arm mechanism main unit that is composed of at least one arm member (46, 50, 52; 280, 284) and at least one pivot mechanism (44, 48, 54); and an attitude correction mechanism that is provided between the arm mechanism main unit and the display unit (24; 272), characterized in that, when an apparent rotation caused by drooping of an end portion of the arm mechanism main unit on the display side is generated in the display unit (24; 272), the attitude correction mechanism is adapted to rotate the display unit (24; 272) in the opposite direction so that the apparent rotation of the display unit (24; 272) can be eliminated, the attitude correction mechanism includes: a rotation shaft that is provided on one of the end portion on the display unit side and the display unit (24; 272); a bearing portion that is provided on the other of the end portion on the display unit side and the display unit (24; 272) and is coupled with the rotation shaft; and a limitation portion (260, 264A) that is adapted to limit a rotation angle range of the display unit (24; 272) about the rotation shaft, a rotation shaft that is provided on one of the end portion on the display unit side and the display unit (24; 272); a bearing portion that is provided on the other of the end portion on the display unit side and the display unit (24; 272) and is coupled with the rotation shaft; and a limitation portion (260, 264A) that is adapted to limit a rotation angle range of the display unit (24; 272) about the rotation shaft, the limitation portion (260, 264A) includes: a movable member that is provided on one of the end portion on the display unit side and the display unit (24; 272); and a member that is provided on the other of the end portion on the display unit side and the display unit (24; 272) and is adapted to limit a movable range of the movable member, a movable member that is provided on one of the end portion on the display unit side and the display unit (24; 272); and a member that is provided on the other of the end portion on the display unit side and the display unit (24; 272) and is adapted to limit a movable range of the movable member, a center line (268; 288) of the rotation shaft is provided in parallel with a normal line of a display surface of the display unit (24; 272), and the center line (268; 288) of the rotation shaft passes a center line of a tilt shaft provided in the arm mechanism main unit such that the center line (268; 288) of the rotation shaft is orthogonal to the center line of the tilt shaft.