An optical fiber ribbon having a thickness equal to 300 µm or less is formed by arranging in parallel optical fibers each obtained by forming a fiber coating on a circumference of a glass optical fiber and integrating the optical fibers with a ribbon coating. The fiber coating is made of a non-flame-resistant ultraviolet curable resin and the ribbon coating has a thickness equal to 40 µm or more and is made of a flame resistant resin. Thus, an optical fiber ribbon having a small thickness and achieving favorable flame resistance and screening characteristics is provided.