Stems of 3-year old energy willow (4 m) were portioned into 1 m length sections and then dried at room temp., shredded to less than 2 mm pieces and studied for moisture, ash, volatile substances, S, H and C contents. Heat of combustion in biomass samples was also detd. Mean values of tested parameters changed slightly for samples taken from different parts of stems and they were smaller than the literature values of the parameters for hard coal.