To provide an image forming apparatus capable of suppressing the occurrence of a void phenomenon, and distortion and color shift of a transferred image by devising a developer used for development.

The thickness of an intermediate transfer belt 27 is set to 300 m. In particular, the thickness of a resin layer is set to 200 m. A developer including toner obtained by externally adding fine particles to columnar toner particles produced by drawing a molten toner component in a cylindrical fiber form and carrying out cutting is used. The columnar toner particles have small adhesiveness to the intermediate transfer belt 27 owing to their shapes.