A developing apparatus includes two rotating members respectively having parallel horizontal axes of rotation and disposed longitudinally opposite to each other, a carrying passage forming mechanism extended between the rotating members to form a carrying passage, and capable of moving along an orbital path to carry a wafer supported thereon along the carrying passage, a sending-in transfer unit disposed at the upstream end of the carrying passage, a sending-out transfer unit disposed at the downstream end of the carrying passage, a developer pouring nozzle for pouring a developer onto the wafer, a cleaning nozzle for pouring a cleaning liquid onto the wafer, and a gas nozzle for blowing a gas against the wafer. The developer pouring nozzle, the cleaning nozzle and the gas nozzle are arranged in that order in a direction in which the wafer is carried along the carrying passage.