PURPOSE: A refrigerator and a manufacturing method thereof are provided to prevent odor by preventing the generation of all kinds of gases generated when microorganism is proliferated and to extend the storage period of food by preventing the spoil and decomposition of the food by forming a lacquer layer. CONSTITUTION: A refrigerant comprises an outer housing and an inner housing. The inner housing is arranged in the outer housing in a state of a front side is opened. A lacquer layer is formed on the interior of the inner housing except the one opened side. An adsorption face is formed between the lacquer layer and the interior of the inner housing. A lacquer mixture mixing a lacquer and a diluent in the ratio of one to two is primarily coated on the interior of the inner housing. The primarily coated lacquer layer is primarily dried for two hours at 20-25 degree in 20%-40% of relative humidity. A lacquer mixture mixing the lacquer and the diluent in the ratio of one to one is secondarily coated on the primarily coated lacquer layer. [Reference numerals] (AA) First step of manufacturing an outer housing forming an exterior shape； (BB) Second step of manufacturing an inner housing with a predetermined space and open front； (CC) Third step of forming an adsorption face on the inner side of the manufactured inner housing except for the open side； (DD) Fourth step of forming a primary lacquer layer by coating a lacquer mixture in which lacquer and a diluent are mixed at the ratio of 1:2 on the inner side of the inner housing formed with the adsorption face； (EE) Fifth step of primarily drying the inner housing formed with the primary lacquer layer at a relative humidity of 20-40% and a temperature of 20-25 degrees for two hours； (FF) Sixth step of forming a secondary lacquer layer by coating a lacquer mixture in which lacquer and a diluent are mixed at the ratio of 1:1 on the primary lacquer layer of the primarily dried inner housing； (GG) Seventh step of secondarily dr
