The present invention addresses the problem of providing a rice planting machine (1) in which cooling efficiency is improved and peripheral components such as cooling system components and power transmission system components are arranged in an efficient and compact manner around an engine (5). The rice planting machine (1) of the present invention is provided with an engine (5) that is mounted on a traveling machine body (2), a transmission case (6) that changes the speed of power from the engine (5), and a seedling planting device (23) that is mounted on the traveling machine body (2). A suction fan (71) for engine cooling is provided on one side surface of the engine (5). The engine (5) is arranged so as to protrude between machine body frames (50) at a position that is lower than both of the machine body frames (50). A ventilation duct (84) that causes cooling air from the suction fan (71) to pass above the machine body frames (50) is arranged on another side surface, said other side surface being on the opposite side of the engine (5) from the side on which the suction fan (71) is provided. An upper exhaust air passage (85) for the engine (5) is formed by the ventilation duct (84), and the area below the machine body frames that are on the other side surface-side of the engine (5) is configured to be a lower exhaust air passage (86) for the engine (5).La présente invention concerne une machine à repiquer le riz (1) dont lefficacité de refroidissement est améliorée et dont les composants périphériques, tels que les composants du système de refroidissement et les composants du système de transmission de puissance, sont disposés de façon efficace et avec un faible encombrement autour dun moteur (5). La machine à repiquer le riz (1) de la présente invention est équipée dun moteur (5) qui est monté sur un châssis mobile de machine (2), dun carter de boîte de vitesse (6) qui adapte la puissance fournie par le moteur en modifiant la vitesse de rotation (5) et dun disp
