A refrigerator is disclosed. The refrigerator includes a storage compartment, and a shelf assembly provided in the storage compartment to be vertically adjustable, wherein the shelf assembly includes a support unit provided to be movable obliquely, and a shelf unit which is mounted on the support unit to move up and down according to an oblique movement of the support unit. The refrigerator has a simple structure capable of lifting a shelf up and down, thereby facilitating the manufacture and reducing manufacturing costs.