The paper presents the results of the investigation of the electrical circuits manufactured by screen printing technology on textile materials. The aim was to compare the print quality (line width, thickness, edge blurriness) and electrical resistance of the circuits printed by using silver paste (5064 Du Pont) on woven polyester non-coated and coated with thin polyurethane polymeric layers. The morphology and percentage of silver of electrical circuits were analyzed by scanning electron microscope (SEM) with an energy dispersive X-ray (EDS) spectrometer. Structure of the material and precision printing direction strongly influence the printed lines. Thin polymer layers close pores and existing interspaces between threads, form surfaces with a low roughness and minimize the paste penetration into the substrate. The results demonstrate a relatively uniform coverage of the conductive paste on the polyester coated with polyurethane