A paddy field operation machine is provided with the components of: a supplying amount varying device (24) which varies the supplying amount of an agricultural material that is supplied by an agricultural material supplying device to field surface, and an actuator (53) which operates the supplying amount varying device (24). Furthermore the paddy field operation machine is provided with the components of: a receiving part which receives a signal from outside； and a control part which outputs an operating signal to the actuator (53) according to the signal received by the receiving part for actuating the actuator (53). Additionally, the paddy field operation machine is provided with a manual operation part (65) which is used for performing manual operation on the supplying amount varying device (24). According to the paddy field operation machine, on condition that the actuator can be used for varying (setting) the supplying amount of the agricultural material, operation load of a driver for the paddy field operation machine can be reduced.
