Sesbania sesban (L) Merr. has shown potential as a multipurpose tree in agro-forestry systems. The bark of sesbania sesban has been traditionally used as astringent, in diarrhea, ulcers, bronchitis, tumors, cirrhoses of liver, hypertension & spleen enlargement. This plant has got good medicinal importance [1]. This study was intended to evaluate the physico-chemical and some pharmacognostic parameters of bark of sesbania sesban. The bark powder was studied for proximate analysis & quantitative determination in terms of parameters such as loss on drying, total ash value, acid-insoluble ash value, water-soluble ash values & extractive values in different solvents. The pharmacognostic parameters are useful for setting standards for crude drug and help to differentiate the plant sample from the adulterants. The pharmacognostic constants for the bark of this plant & the numerical standards reported in this work could be useful for the compilation of a suitable monograph for its proper identification.