PROBLEM TO BE SOLVED: To highly accurately adjust (set) a supply amount of agricultural materials with an actuator in a paddy field working machine.SOLUTION: A paddy field working machine includes an agricultural material supply device 11 which supplies agricultural materials to a paddy field, a supply amount adjustment device 24 which adjusts the supply amount of the agricultural materials to the paddy field by the agricultural material supply device 11, and a display 57 which displays the supply amount of the agricultural material supply device 11 on the basis of the adjustment amount by linking to the supply amount adjustment device 24. A reference position of producing a reference supply amount in the agricultural material supply device 11 is set in the supply amount adjustment device 24. Correction on the display 57 is possible so that a display supply amount displayed by the display 57 at the reference position becomes the reference supply amount.
