PROBLEM TO BE SOLVED: To solve a problem that muddy water or the like, which a rear wheel traveling in a farm field splashes during farm work, is taken in an air cleaner depending on a shape and position or the like of an air cleaner intake port, and the air cleaner becomes dirty.SOLUTION: A working vehicle includes an engine 12 mounted between front and rear axles 28, 30 of a traveling machine body 1, and a drivers seat 5 arranged on a vehicle body cover 40 for covering the engine 12 from above. An air cleaner 154 is arranged on one of left and right sides of the engine 12, and an intake port 154c of the air cleaner 154 is opened upward. The intake port 154c is covered with a silencer 156 from above, and a labyrinth-like outside air guide passage 157 is formed between the intake port 154c and the silencer 156.SELECTED DRAWING: Figure 20COPYRIGHT: (C)2017,JPO&INPIT【課題】エアクリーナ吸気口の形状や位置等によっては、農作業時に、圃場を走行する後車輪が跳ね上げた泥水等をエアクリーナ内に取り込んで、エアクリーナを汚損してしまうという問題を解消する。【解決手段】本願発明の作業車両は、走行機体1の前後車軸28,30間にエンジン12を搭載し、エンジン12を上方から覆う車体カバー40上に操縦座席5を配置する。エンジン12の左右一側方にエアクリーナ154を配置し、エアクリーナ154の吸気口154cを上向きに開口させる。吸気口154cを上方から消音器156で覆い、吸気口154cと消音器156との間にラビリンス状の外気案内路157を形成する。【選択図】図20