The electrospirmability of alginate was improved by opening of uronate ring. The uronate rings were oxidized and opened by sodium periodate. The effects of the oxidant and the solution concentrations on the spinnability and the characteristics were studied. As the alginate was more oxidized, the solution viscosity was decreased and the finer and more uniform fibers were obtained. As a result of the ring opening and the degradation by oxidation, the crystallinity and the thermal stability of the electrospun oxidized alginate web were decreased.