Disclosed is a medical instrument. The medical instrument includes a main body including at least one of an operation part and a display part, and a coupling lever arranged on a rear portion of the main body, a cart including a desk on which the main body is positioned, a front coupling member disposed on the desk and adapted to attach and detach a front portion of the main body to/from the desk, and a rear coupling member disposed on the desk and adapted to attach and detach a rear portion of the main body to/from the desk and fix the main body to the desk by the coupling lever.
