PURPOSE: To obtain the subject device capable of performing weeding, disinfecting, harvesting, etc., of strawberries, lettuces, etc., planted in a ridge according to a riding method by installing low seats and a frame part in a portal mobile car body running on rails laid on passages on both sides of the ridge.

CONSTITUTION: A portal car body 20 having wheels 4 running on rails 3 laid nearly parallel to a ridge along passages on both sides of the ridge is equipped with low seats 7 and a frame part 21. A harvesting box, a disinfectant solution tank, etc., are loaded onto the frame part.