To provide a rice processing support system that can easily grasp actual rice processing in a predetermined period, for each rice processing machine.SOLUTION: An external apparatus (support device) of a rice processing support system includes: a rice processing machine 1 that processes rice; an achievement acquisition unit 80A that acquires from the rice processing machine rice processing results including the processing time and rice processing amount processed by the rice processing machine 1; a period accepting unit 80B that accepts a predetermined period; a period achievement calculation unit 80C that calculates the actual rice processing amount in the predetermined period on the basis of the processing time of the rice processing achievement acquired by the achievement acquisition unit 80A; and a second display device 81 that displays the actual rice processing amount in the predetermined period.SELECTED DRAWING: Figure 2