In this study, jet current and jet life in roller electrospinning of polyurethane (PU) were measured. The relationships between jet current and jet life and number of Taylor cones/m(2) (NTC/m(2)), spinning performance (SP), and fiber properties (diameter, non-fibrous area) were analyzed. In addition, the effects of PU and tetraethylammonium bromide (TEAB) concentrations on jet current and jet life were determined. It was observed that jet current increases with PU and TEAB concentration, while jet life decreases. According to the results, NTC/m(2) and spinning performance increase with jet current and decrease with jet life. Moreover, it was observed that jet current movement gives an idea about jet life, and it was also determined that there is a relationship between jet life and fiber morphology.