A developing apparatus including: a developer carrying member for carrying a developer, the developer carrying member being provided with an elastic layer and adapted to develop, with a developer, an electrostatic image formed on an image bearing member; wherein the developer includes a toner, the toner has a shape factor SF-1 of 100 or more but less than 130, the toner has a storage modulus G' (140.degree. C.) at 140.degree. C. of 2.0.times.10.sup.3 dN/m.sup.2 or more but less than 2.0.times.10.sup.4 dN/m.sup.2, the toner has a temperature, when the toner has a viscosity of 1.0.times.10.sup.3 Pas in a flow tester temperature elevation method, of 115.degree. C. or more but less than 130.degree. C., and, in a surface roughness of the developer carrying member, a center-line mean roughness Ra, a ten-point mean roughness Rz and a mean spacing Sm of irregularities satisfy following relationships (1):.ltoreq..ltoreq..ltoreq..ltoreq..times..times..mu..times..times. ##EQU00001##