Provided are a heat exchanger equipped with a cold reserving part and a manufacturing method thereof, equipped with a cold reserving part, in which since a cold reserving material charging part is formed at a portion at which an inlet and outlet member is formed, an additionally protruding part to inject the cold reserving material is not required, such that the heat exchanger may be miniaturized and may more rapidly and effectively absorb cold air to increase a cold reserving effect, and a manufacturing method of a heat exchanger equipped with a cold reserving part which forms the cold reserving material charging part to charge the cold reserving material after coating the heat exchanger to block a coating solution from introducing into the heat exchanger, thereby preventing the heat exchanger from corroding due to the coating solution to increase durability and more increase manufacturing performance.