The production of the Cellulase enzyme by the thermophilic coprophilous fungus Malbranchea cinnamomea was observed through Congo red method and optimization conditions of Cellulase production was done. Of the different media used, it is observed that theYeast Extract Starch Medium and czapek Dox was found to support maximum growth and production of cellobiohydrolase and endoglucanase. The optimum production of cellulases by the fungus required 9 days of incubation at pH 7.0 and a temperature of 45⁰C. Among the various carbon sources tested, starch was found to induce maximum amount of both the cellulases, whereas yeast extract induced more amount of cellulases among the different nitrogen sources tested for cellulase production by Malbranchea cinnamomea.