A refrigerator includes a main body, a storage chamber formed in the main body, a shelf support portion provided at a rear side of the storage chamber, a plurality of shelves coupled to the shelf support portion so that the shelves are arranged next to each other, and an adjustment member coupled to the shelves so as to remove a height difference between the plurality of shelves. Coupling grooves are respectively formed in the shelves. The adjustment member is inserted into the coupling holes of the shelves and then rotates by a predetermined angle such that the adjustment member is fixed to the shelves. The adjustment member maintains a constant interval between the shelves and prevents the shelves from moving relative to each other. The adjustment member is easily coupled to and separated from others.