This study was aimed to observe the effect of fish immersion in the liquid smoke and to determine the best concentration of the liquid smoke on microbiological quality catfish (Clarias sp) fillets during storage at cold temperature (5°C). The liquid smoke concentrations were varied at 4% (A1), 6% (A2) and 8% (A3) and the fish was observed during storage at the periods of 0, 10, 20 and 30 days.…