Evaluation of biomass and some physical and chemical properties of Dendrocalamus stricus  6-year-old (Barkley et al ) grown under sewage water in Sarabuim Ismailia Governorate were conducted during the season of 2009. It is shown from data that, plants where cut has weight of 3.622 kg then weight decreased to 1.203 kg after 100days from cutting. Also culm diameter decreased from 2.446 cm to 2.075 cm after 80 days from cutting. It is observed that NPK differed from group to other, the group C ( culm diameter more than 4 cm) has the highest content of nitrogen while, P and K are less than the group which their plants culm less than 0.4 cm. Wood extracts, cellulose and lignin are increased with increasing plant culm diameter. So the group C (culm diameter more than 4 cm) has the largest amount of cellulose, lignin and fiber length  (77.437%, 81.197% and 1.85 mm ), respectively. Also group C (culm diameter more than 4 cm) has the largest content of heavy metal (Ni, Cd and Pb) 121.83, 8.160 and 50.773 mg/100 g., respectively. Branches number and their weight increased from group A (culm diameter less than 3 cm) to group C (culm diameter more than 4 cm) (culm diameter is above 4 cm) and group B (culm diameter 3- 4 cm) in between.