A brake apparatus provided on a body of a medical apparatus, the brake apparatus including: a rail unit； a lever unit configured to rotate with respect to a rotational shaft； an elastic member provided on the lever unit at a first end of the lever unit and configured to provide an elastic force to rotate the lever unit； a wedge provided on a second end opposite to the first end of the lever unit, configured to be inserted into the rail unit according to rotation of the lever unit and configured to apply braking pressure on the rail unit.
