A refrigerator comprising: a main body ; a storage compartment that is formed inside the main body ; a shelf coupling unit that is provided at an inner rear side of the storage compartment ; and cantilever shelves which are coupled to the shelf coupling unit to be supported, characterized in that each cantilever shelf includes: a fixed shelf that has side frames protruding forward from both sides thereof; hanger brackets which are respectively provided at the both sides of the fixed shelf so as to support the fixed shelf and having a coupling ring coupled to the shelf coupling unit; a slide shelf that is provided so as to be slidably movable between the side frames ; a folding shelf that is rotatably provided at a rear side of the slide shelf between the side frames ; and a spread prevention unit (340, 530; 360, 620; 350, 540) that prevents the side frames from being mutually spread by a load exerted on the cantilever shelves , wherein the spread prevention unit includes first spread prevention protrusions respectively provided at both sides of the slide shelf and first spread prevention grooves respectively provided in the side frames , so that the first spread prevention protrusions are inserted into the first spread prevention grooves when the slide shelf is maximally drawn out. a main body ; a storage compartment that is formed inside the main body ; a shelf coupling unit that is provided at an inner rear side of the storage compartment ; and cantilever shelves which are coupled to the shelf coupling unit to be supported, characterized in that each cantilever shelf includes: a fixed shelf that has side frames protruding forward from both sides thereof; hanger brackets which are respectively provided at the both sides of the fixed shelf so as to support the fixed shelf and having a coupling ring coupled to the shelf coupling unit; a slide shelf that is provided so as to be slidably movable between the side frames ; a folding shelf that is rotatably provided at a rear side of the slide shelf between the side frames ; and a spread prevention unit (340, 530; 360, 620; 350, 540) that prevents the side frames from being mutually spread by a load exerted on the cantilever shelves , wherein the spread prevention unit includes first spread prevention protrusions respectively provided at both sides of the slide shelf and first spread prevention grooves respectively provided in the side frames , so that the first spread prevention protrusions are inserted into the first spread prevention grooves when the slide shelf is maximally drawn out. a fixed shelf that has side frames protruding forward from both sides thereof; hanger brackets which are respectively provided at the both sides of the fixed shelf so as to support the fixed shelf and having a coupling ring coupled to the shelf coupling unit; a slide shelf that is provided so as to be slidably movable between the side frames ; a folding shelf that is rotatably provided at a rear side of the slide shelf between the side frames ; and a spread prevention unit (340, 530; 360, 620; 350, 540) that prevents the side frames from being mutually spread by a load exerted on the cantilever shelves , wherein the spread prevention unit includes first spread prevention protrusions respectively provided at both sides of the slide shelf and first spread prevention grooves respectively provided in the side frames , so that the first spread prevention protrusions are inserted into the first spread prevention grooves when the slide shelf is maximally drawn out. <EOS>