The proximate analysis, physicochemical and biological analysis were made on the samples of Korean and imported chilled pork shoulders. The samples were stored at 4 ±1℃. In the proximate analysis of chilled porks, there were significant differences in crude fat, crude protein and ash (P$lt;0.05). but moisture contents were not different statistically(P$gt;0.05). The fat content of American pork shoulders, which were in good marbling state, was 17.01±1.62%. During the storage period of 25 days, the total plate count of imported pork stored at 4.0±1℃ 5.0 x 10^(6)CFU/㎠, those of domestic ones 3.0 x 10^(5)CFU/㎠∼5.7 x 10^(5)CFU/㎠. The numbers of coliform were 9.0 x 10²CFU/㎠∼8.3 x 10³CFU/㎠ in the domestic and 1.1 x 10⁴CFU/㎠ in the imported. Thiobarbituric Acid Reactive Substance (TBARS) value of American pork was higher than that of domestic ones(P$lt; 0.001), On the other hand, Volatile Basic Nitrogen (VBN) value of domestic B company was higher than those of others(P$lt; 0.01). The pH values were normal during the experimental period. Purge losses were 0.51±0.02%∼2.92± 0.53% during the period(P$lt;0.001). The domestic and imported pork shoulders were not significantly different in cooking loss.