Today the crisis of environment and energy has been a huge obstacle for the progress of human civilization. The most predominant energy source which is the fossil fuel supply is limited and it also causes environmental effects such as green house gases. The value of cellulose as a renewable source of energy has made cellulose hydrolysis the subject of intensive research and industrial subject. The aim of the present study is to isolate the efficient cellulase producing organisms from the soil of sacred grove. The bacterial strain SG21 had the maximum cellulase activity of 2.9U/ml. 16S rRNA of the strain was sequenced and identified as P. aeruginosa.