A developing apparatus includes a developing roller, a toner-supplying roller, and at least one toner-supplying member. The developing roller develops an electrostatic latent image formed on a photoconductive drum with toner. The toner-supplying roller is formed of a foamed material and rotates in contact with the developing roller to supply the toner to the developing roller. The toner-supplying member is disposed over the toner-supplying roller and opposes an upper surface of the toner-supplying roller. The toner-supplying member approaches the toner-supplying roller periodically to supply the toner to the toner-supplying roller. When the toner-supplying member is closest to the toner-supplying roller, the developer-supplying member and the toner-supplying roller are either in contact with each other or are spaced apart by a distance not longer than 0.8 mm.