| Extensive research work has been done on proximate analysis of the fish around the world but very little analysis on marine fish Terapon jarbua have been performed. Therefore, the current analysis was carried out to analyze the proximate composition of T. jarbua. 70 samples of T. jarbua ranging from 18.00-29.90 cm in length and 119.60-429.50 g in body weight were collected from Fisheries Harbour, Karachi Pakistan. The mean percentage of constituents were found to be for water 73.22%, ash 6.72%, fat 3.45% and protein 16.62% in the whole wet weight of body of T. jarbua. % water represented correlation with highly significant value (P<0.001) with protein, ash, fat and organic constituents in wet weight. Fish body weight represented highly significant (P<0.001) positive relation to all the studied body constituents in log transformed data. Total length also represented highly-significant positive relation to all the studied body constituents except for fat which showed nonsignificant correlation (P>0.05). Fulton's condition factor showed nonsignificant relations to whole percent (%) body constituents except percent (%) ash, which showed least significant relation (P<0.05) for T. jarbua.