Among the cellulases by Cellulomonas sp. KL-6. CMCase and filter paperase, which were produced as the out enzymes of cell, had been much produced, but very small amounts of ${eta}-glucosidase $, the enzyme of which is cell bound form, was produced by this organism. The optimal culture times for CMCase and filter paperase productions were 5 days, while that of ${eta}-glucosidase$ was 4 days. When this strain was cultured under the optimal medium for enzyme production, CMCase, FPase and ${eta}-glucosidase$ were $82;units/m{ell},;80;units/m{ell};and;1.2;units/m{ell}$, respectively. Thus these results were showed to increase enzyme productivities as about $60{sim}70%$ than those produced in basal medium. $CaCO_3$ injected to the medium as the ratio of 0.1% was not only enhanced cellulase activities but also effective as acid neutralizing agent. The production effects of lignase and lactase by this bacterium in filter paper medium was not appeared.