In the present invention a rice transplanting machine (1) is configured such that: a planting work machine (3) is supported by a link device (20) so as to be vertically movable with respect to a traveling machine body (2) the link device (20) is connected to the traveling machine body (2) a front hitch (50) is provided to the link device (20) a rear hitch (60) is provided to the planting work machine (3) the front hitch (50) and the rear hitch (60) are connected to each other and an adjustment mechanism (70) is provided which allows for the changing of the position of the planting work machine (3) relative to the traveling machine body (2) to a yaw direction (Y) by changing the slope of the rear hitch (60) relative to the front hitch (50).
