A refrigerator is equipped with an improved middle hinge module, by which a door is hinged to a main body, capable of preventing noise when the door is opened and closed and easily adjusting a height of the door. The middle hinge module includes a hinge member fixed to a main body, a casing rotatably coupled to the hinge member and configured to rotate with a door, a shaft accommodated in the casing and coupled to the hinge member, a cam member disposed on the shaft and configured to convert rotational movement of the door into vertical linear movement, a compression spring disposed on the cam member and configured to be compressed by vertical linear movement of the cam member, and a height adjustment screw, an upper portion of which is coupled to a lower portion of the shaft to adjust a height of the door.