A new polymeric reagent,cross-linked poly(4-vinylpyridine)supported azide ion,[P4-VP]N3,was introduced as polymeric reagents for efficient and regioselective conversion of epoxides to azidohydrins in the presence of cross-linked poly(4-vinylpyridine)supported sulfuric acid,[P4-VP]H2SO4,as a solid proton source and as catalyst under solvent-free conditions.The advantages of this polymeric reagent over some of those reported in the literature are easy work-up procedure and regeneration of the reagent. A new polymeric reagent, cross-linked poly (4-vinylpyridine) supported azide ion, [P4-VP] N3, was introduced as polymeric reagents for efficient and regioselective conversion of epoxides to azidohydrins in the presence of cross-linked poly vinylpyridine) supported sulfuric acid, [P4-VP] H2SO4, as a solid proton source and as catalyst under solvent-free conditions. These advantages of this polymeric reagent over some of those reported in the literature are easy work-up procedure and regeneration of the reagent.