A refrigerator includes a cabinet with a storage chamber, and a shelf assembly. The shelf assembly includes guide members respectively mounted to opposite side walls of the storage chamber, a shelf vertically movable while being guided by the guide members, side walls extending downwards from opposite lateral ends of the shelf and vertically movable while being guided by the guide members, guide slots formed through the guide members while extending in forward and rearward directions, a pair of cam members pivotably mounted to an outer surface of each guide member, first and second links connected between the cam members, to simultaneously pivot the cam members, a handle link connected, at one end thereof, to the second link, and a handle member coupled to the other end of the handle link while extending through the corresponding guide slot, to protrude inside the guide member.