PROBLEM TO BE SOLVED: To provide an working machine having improved drainage performance of ground-leveling rotors and controlling falling of seedlings by the effect of mud flow and water flow to an adjacent seedling.SOLUTION: An working machine includes an operating part which is liftably installed on the rearward of a traveling machine body, and a ground-leveling device provided with a plurality of ground-leveling rotors disposed side by side in the right and left direction is installed on the operating part. The rotors are set to have different diameters. Consequently, the ground-leveling performance of the ground-leveling rotors is improved and fall of seedlings by approach of mud flow and water flow to adjacent seedlings can be controlled.COPYRIGHT: (C)2014,JPO&INPIT【課題】 本発明の課題は、整地ロータの排水性を向上させ、例えば隣接する苗へ泥流や水流が及んで苗を倒すようなことを抑制することにある。【解決手段】 走行車体の後側に昇降可能に作業部を設け、整地ロータを左右に複数並べた整地装置を作業部に設け、左右に並べた整地ロータの外径が互いに異なる構成とした作業機とした。これにより、整地ロータの排水性を向上させ、例えば隣接する苗へ泥流や水流が及んで苗を倒すようなことを抑制できる。【選択図】 図18