RICE PADDY WORKING MACHINE

PURPOSE:To enable to form a drainage channel of stabilized depth and control easily its depth, when needed, by utilizing the performance of a riding-type rice transplanter effectively. CONSTITUTION:In a rice paddy working machine connecting the working device for forming a drainage channel 6, instead of the rice-transplanting device, to the going up and down link 4 installed on the rear of the running body, the working device 6 is provided with the channel-cutting plate 13 and the ground float 13 connected to the control means of the hydraulic cylinder for driving the up and down link mechanism 4. The link mechanism 4 is driven, as it is controlled based on the vertical fluctuation of the ground float 13 to maintain the device 6 at a prescribed height from the paddy surface, as the depth controller 21 for changing the height to the drainage cutter 10 of the ground float 13 is set so that it can be maneuvered from the driver seat of the running body 2.