An electrophotographic toner having a core-shell structure including a crystalline resin in its core region or a sea-island structure including a crystalline resin in its island region, wherein the toner has 1) a resistance of 5.0.times.10.sup.12 .OMEGA.cm or higher, 2) a dynamic viscosity coefficient of 3.times.10.sup.3 Pas or higher at a temperature which is 50.degree. C. higher than a melting point of the crystalline resin, and 3) a dynamic viscosity coefficient of 1.times.10.sup.5 Pas or lower at a temperature which is 10.degree. C. higher than the melting point of the crystalline resin.