A toner for developing an electrostatic image is disclosed. The toner has softening point Tsp of from 90° C. to 110° C., and the toner satisfies the relation of 0.02≦(Sw/S)×100≦10, Sw being an area of a wax domain having largest diameter among wax domains at a cross section of the toner particle, and S being entire area of the cross section of the toner particle.