A medical apparatus comprising: a main body including an inputter configured to receive a user input for controlling the medical apparatus, wherein the user input includes an input of touching a touch screen; a display device comprising the touch screen positioned to be rotatable on one axis with respect to the main body, and extending along one plane; a locking device configured to limit a rotation of the display device with respect to the main body when pressure being smaller than a preset first pressure is applied to the display device along a direction that is perpendicular to one surface of the display device; and characterized in that the medical device further comprises an attenuator configured to attenuate a vibration of the display device with respect to the main body when pressure being smaller than the first pressure is applied to the display device along the direction that is perpendicular to the one surface of the display device, and in that the locking device further comprises a first locking member positioned on the display device, and a second locking member positioned on the main body attached/detached to/from the first locking member; when pressure being smaller than the preset first pressure is applied to the display device, the first locking member is attached to the second locking member and the rotation of the display device with respect to the main body is limited; and when pressure being greater than or equal to the preset first pressure is applied to the display device, the first locking member is detached from the second locking member and the display device is rotatable with respect to the main body. a main body including an inputter configured to receive a user input for controlling the medical apparatus, wherein the user input includes an input of touching a touch screen; a display device comprising the touch screen positioned to be rotatable on one axis with respect to the main body, and extending along one plane; a locking device configured to limit a rotation of the display device with respect to the main body when pressure being smaller than a preset first pressure is applied to the display device along a direction that is perpendicular to one surface of the display device; and characterized in that the medical device further comprises an attenuator configured to attenuate a vibration of the display device with respect to the main body when pressure being smaller than the first pressure is applied to the display device along the direction that is perpendicular to the one surface of the display device, and in that the locking device further comprises a first locking member positioned on the display device, and a second locking member positioned on the main body attached/detached to/from the first locking member; when pressure being smaller than the preset first pressure is applied to the display device, the first locking member is attached to the second locking member and the rotation of the display device with respect to the main body is limited; and when pressure being greater than or equal to the preset first pressure is applied to the display device, the first locking member is detached from the second locking member and the display device is rotatable with respect to the main body.