An anti-accumulation section is provided at a section where an inner surface of a developer container abuts a surface of a doctor blade on an upstream side of a rotation direction of a developing roller. An angle between a surface of the anti-accumulation section facing the developing roller and the surface of the doctor blade on the upstream side of the rotation direction of the developing roller is set to be larger than an angle between a circle concentric with a cross section of the developing roller perpendicular to an extending direction of the developing roller and the surface of the doctor blade on the upstream side of the rotation direction of the developing roller at the section where the surface of the anti-accumulation section facing the developing roller and the surface of the doctor blade on the upstream side of the rotation direction of the developing roller abut. This realizes, with a simple configuration, a developing device capable of forming images of high quality without nonuniform development.