The present invention relates to a device for adjusting the water level of a rice field, which is capable of easily adjusting the water level of a rice field. The device for adjusting the water level of a rice field comprises: a case mounted on a rice field ridge, formed by coupling a front and a rear case having a water outlet hole, and provided with a guide unit formed on an upper portion thereof a rear cover which is detachably mounted in the water outlet hole of the rear case, and in which a water outlet in fluid communication with the inside of the case is arranged on an upper portion or a lower portion thereof depending on the water level of a rice field a water level controller including a vertical adjustment plate which is positioned on a rear of the front case and adjusts the water level of the rice field by a vertical operation of adjusting the water outlet hole, and an adjustment body integrated into an upper portion of the vertical adjustment plate, penetrated to the outside through the guide unit, and provided with an operating handle mounted on an end thereof and an adjustment plate guide which is symmetrically mounted on both sides of the rear of the front case, positions the vertical adjustment plate on a rear surface of the front case, and guides the position thereof when operating vertically.La présente invention concerne un dispositif permettant dajuster le niveau deau dune rizière, lequel est capable dajuster facilement le niveau deau dune rizière. Le dispositif permettant dajuster le niveau deau dune rizière comprend : un boîtier monté sur une crête de rizière, formé en couplant un boîtier avant et un boîtier arrière possédant un orifice de sortie deau, et pourvu dune unité de guidage formée sur une partie supérieure de celui-ci un couvercle arrière qui est monté de façon amovible dans lorifice de sortie deau du boîtier arrière, et dans lequel une sortie deau en communication fluidique avec lintérieur du boîtier est disposée sur une partie supé
