A refrigerator includes a storage container configured to slide into and out of a storage compartment and a rail unit configured to guide movement of the storage container and a support member disposed in the storage compartment to support the rail unit and coupled to a bottom side of an inner case. Guide bars that guide movement of the storage containers are installed at lower ends of the storage container. Roller units are installed at the bottom surface of the storage compartment by using the foam insulation material blown into the space between the inner case and the outer case.