PROBLEM TO BE SOLVED: To provide a rice planting machine with left and right side clutches, capable of engaging and disengaging the left and right side clutches in interlocking with steering operation. SOLUTION: In this rice planting machine wherein a steering operation part and the left and right side clutches are interlocked and connected with one another, the clutch operating force from the steering operation part is transmitted to the side clutches through cams and roller mechanisms 139, 142.