PROBLEM TO BE SOLVED: To provide a working truck so designed that: a liquid agrochemical tank is laid under the left and right rear wheels to lower the center of gravity of the machine body and improve views around the liquid agrochemical tank from the steering seat of a relevant operator.SOLUTION: A working truck has the following construction: both the rear left and right sides upper part of the transmission case of a traveling truck are installed with left and right fenders and left and right rear side axle cases so as to extend left and right from both the rear left and right sides lower part, respectively large-diameter left and right rear wheels are set up via left and right rear axles suspended axially on the lower end of left and right final axle cases extended downward from both the left and right sides of the left and right rear side axle cases, respectively a liquid agrochemical tank composed of a left side tank part, right side tank part and rear side tank part is installed so as to enclose both the left and right sides and the rear side of the steering seat and the left and right inner sides of the left and right tank parts are covered with both the left and right sides of the transmission case and the inner side longitudinal fender of the left and right fenders, the upper side face of the left and right tank parts are covered with an upper side lateral fender of the left and right fenders, and the left and right outer sides of the left and right tank parts are covered with the inner sides of the left and right rear wheels.COPYRIGHT: (C)2014,JPO&INPIT【課題】作業車両において、薬液タンクを左右後輪の下側部位に配置し、機体の重心を低くし、オペレータの操縦席からの薬液タンク周辺の視界を良好にする。【解決手段】走行車体のミッションケースの後部左右両側上部に左右フェンダを、後部左右両側下部から左右に延出するように左右後側アクスルケースを取り付け、左右後側アクスルケースの左右両側部から下方へ延出している左右ファイナルアクスルケースの下端部に軸架している左右後車軸を介して大径の左右後輪を設ける。操縦席の左右両側及び後側部を取り囲むように左側タンク部、右側タンク部及び後側タンク部からなる薬液タンクを配設する。そして、左側タンク部及び右側タンク部の左右方向内側面をミッションケースの左右両側面及び左右フェンダの内側縦フェンダで覆い、左右タンク部の上側面を左右フェンダの上側横フェンダで覆い、左右タンク部の左右方向外側面を左右後輪の内側面で覆う構成とする。【選択図】図1