Every transformant has different ability of producing cellulase. After plasmid was transferred into the host strain of marine A. niger, ten growth faster transformants were selected to analyze ability of producing cellulase. Exoglucanase and endoglucanase activity from the ten transformants was analyzed. Activity of exoglucanase and endoglucanase activity from the ten transformants was much higher than that of the host strain ( Fig. 2). Exoglucanase activity from the transformant T98 was increased to 0.81 U/ml from the 0.21 U/ml from the hose strain. Endoglucanase activity from the transformant T98 was increased to 19.10 U/ml from the 4.10 U/ml from the hose strain.