Abstract: An improved cooling air distribution apparatus for a refrigerator which is capable of easily installing a rack at a predetermined position in a refrigerator compartment by changing the structure of a rack and a cooling air distribution duct as well as distributing a cooling air in multiple directions, for thus enhancing a cooling air circulation efficiency in the refrigerator, which includes a plurality of receiving groove formed in a front surface of the cooling air distribution duct and each side wall surface in the refrigerator compartment, a plurality of cooling air inlet formed in the engaging groove for introducing the cooling air into the refrigerator compartment, and an opening/closing unit hinged to a reverse side of each cooling air inlet for opening/closing the cooling air inlet, and a rack duct insertable into each engaging groove and each cooling air inlet for discharging the cooling air into the refrigerator compartment in multiple directions.