Segmented block copolyetherester (CPEE) solutions containing three kinds of nanoparticles were electro-spun and the resultant nanocomposite webs were characterized. Nano-sized clay, silica, and multi-walled carbon nan-otubes (MWNT) were used as nanoparticles and dichloromethane/trifluoro acetic acid (50:50, v/v) mixed solution was used as an electrospinning solvent. The FE-SEM analysis of the electrospun webs revealed that diameter of the nano-composite fibers was greater than that of pure CPEE. According to the FE-SEM results of the plasma-etched web, we knew that MWNT was aligned along fiber and silica particles were rather aggregated than being separated to the primary particles. DSC experiments indicated that electrospun web had higher melting temperature and heat of fusion than the film prepared from the same solution.