An image forming apparatus comprises: conveyance rollers for conveying paper to an image forming unit; a curved paper path for guiding paper conveyed by the conveyance rollers; and registration rollers, which are located at a downstream side of the paper path in a paper conveyance direction, for regulating the tip of paper to be conveyed to the image forming unit. The paper path has an outer guide part which constitutes an outer periphery side of the paper path, and an inner guide part which constitutes an inner periphery side of the paper path. The outer guide part is provided with an outer recess, which is depressed outward from the paper path, formed across the full width of paper. The inner guide part is provided with an inner recess, which is depressed in such a manner that the paper path expands, formed across the full width of paper.