A refrigerator includes a partition wall provided between first and second storage chambers and having a partition wall insulator, an evaporator case arranged in the partition wall and communicating with the first and second storage chambers, an evaporator installed inside the evaporator case, a grill cover provided on a rear side of the evaporator case and configured to accommodate a blower fan, and support guides provided in the grill cover and supporting a rear portion of the evaporator, such that an internal storage space of the refrigerator is increased, and a withdrawal distance of a drawer provided in the refrigerator is increased.