PROBLEM TO BE SOLVED: To enable space-efficient and small folding. A paddy weeder is provided with a weeding machine 3 including a row weeding mechanism 12 and a stock weeding mechanism 13 on a riding traveling machine body. The passenger traveling vehicle body is configured to be able to travel freely in a paddy field by one front wheel 2a and a pair of left and right rear wheels 2b. The inter-row weeding mechanism 12 is provided with inter-row rotors 16 that are rotatably driven around a horizontally-rotated inter-row rotor drive shaft 15 and that correspond to a plurality of inter-rows, respectively. The inter-rotor rotor 16 corresponding to the inter-rolling rail is formed in two parts on the right and left substantially directly above the running track T of the front wheels 2a and the rear wheels 2b. The inter-plant weeding mechanism 13 is a swing tooth that swings left and right with respect to the traveling direction with the rotation of the left and right inter-plant tooth drive shafts 21 that are horizontally supported. The weeding device 3 is configured such that an outer portion of the weeding device 3 from a position directly above the traveling track T of the rear wheel 2b can be folded upward with respect to a central portion thereof via a support shaft. [Selection diagram]