This study was performed to investigate the contents of sulfites in 2,770 dried marine products in Seoul Chung-Bu market from March to October in 1999. Sulfites of the samples were determined by Zn powder reduction method and Monnier-Williams's modified method. Eight samples of 2,770 (0.29%) were detected over 30ppm in S02 contents by Monnier-Williams's modified method. In samples detected over 30ppm, six dried filefishes(130.2-573.4ppm) were imported from Vietnam, same kind of other one(114.2ppm) was from China and the other one Alaska pollack(195.3ppm) was domestic. By Zn powder reduction method, 259 dried marine products (259/2,770=9.35%) were positive reaction (1-30ppm). These were 93 dried shrimps, 53 filefish meats, 34 dried squids, 33 slices of dried pollacks and 17 sea mussel meats. So sulfites must be use commonly to prevent black spot and preserve for many dried shrimps, filefishes meats, dried squids etc. According to results, the quality test for the imported dried marine products must be reinforced to supply safety food for the citizens.