PROBLEM TO BE SOLVED: To provide a technology which suppresses reduction in herbicidal effect by suppressing rolling of a weeder without using an electric controller.SOLUTION: A weeder 20 of the present invention comprises: swing teeth 24 for weeding spaces between seedlings; a plurality of interrow rotors 23 for weeding interrow spaces while rotating; and two rolling suppression plates 25. The plurality of interrow rotors 23 arranged at an equal interval in a longitudinal direction include two outer side rotors 23a arranged at both ends in the longitudinal direction. At least portions of the rolling suppression plates 25 overlap with the outer side rotors 23a in a front-and-rear direction, respectively. The rolling suppression plates 25 are inclined downward toward the rear side. By arranging the two rolling suppression plates 25 at both left and right ends of the weeder 20, rolling of the weeder can be suppressed effectively without using an electric controller. As a result, it is possible to improve work e
