An image forming apparatus for reproducing an image corresponding to a digitized image signal includes; an imaging member; a halftone image forming device for reproducing a latent image composed of a plurality of pixels on the imaging member, and for developing the latent image so that coloring particles are adhered in each pixel being put together as an island, the halftone image including a relatively low density halftone image; and a transfixing device for simultaneously transferring the halftone image and fixing the halftone image onto a recording sheet. The image forming apparatus may further includes an intermediate transfer medium. The island-like toner image reproduces the halftone image clearly.