A supersymmetric SU(2) x U(1) gauge model for the electromagnetic, weak, and neutral weak interactions of the electron is constructed. After masses are created via spontaneous symmetry breaking, the electron and its neutrino remain massless to lowest order while a heavy electron and an accompanying neutral lepton acquire masses comparable, respectively, to those of the intermediate vector bosons W/sup ..mu..//sub +-/ and Z/sup ..mu../. Lepton number is conserved in a natural way without requireing bosons to carry lepton number. (AIP)