PURPOSE: A deodorizing agent using sea food and organic acid and a manufacturing method thereof are provided to manufacture seafood including sea urchin and crab shell by mixing and maturing organic acid, formaldehyde, and pyridine.CONSTITUTION: A deodorizing agent using sea food and organic acid comprises 40-60g of organic acid and 10-50g of sea food extracted inorganic salt based on 1 liter of deodorization liquid. The organic acid is obtained from timber extract. The wood chip is input and ignited into a carbonization furnace and liquefied carbon gas by using coolant in order to remove tar and obtain acetic acid, butylic acid (Butylic Acid), and crotonic acid as timber extracts. The deodorizing agent comprises 10g of acetic acid based on 1 liter of deodorization liquid, 16g of butylic acid based on 1 liter of the deodorization liquid, 22g of crotonic acid based on 1 liter of the deodorization liquid and 48g of the organic acid based on 1 liter of the deodorization liquid.COPYRIGHT KIPO 2013본 발명은 해산물과 유기산을 이용한 탈취제 및 그 제조방법에 관한 것으로, 보다 상세하게는 성게, 게의 껍질을 포함한 해산물을 유기산과 포름알데히드 및 피리딘과 혼합 숙성시켜 제조함으로서, 탈취효과가 우수하면서 비료의 효과도 갖도록 하는 해산물과 유기산을 이용한 탈취제 및 그 제조방법을 제공한다.