PROBLEM TO BE SOLVED: To increase the capacity of a fuel tank so as to significantly reduce the number of times of refuel, enable a long-hour continuous operation of a combine, and maintain traveling performance by suppressing the influence to the left/right weight balance of the machine.SOLUTION: The fuel tank (8) is mounted on a traveling frame (3) in the rear side of a grain threshing machine (6). The main part of the fuel tank (8) is disposed at an intermediate position of left and right crawlers (1, 1) in the rear view of the machine body. Both end parts of the fuel tank (8) are formed to extend respectively in the left/right directions to the vicinities of the positions above the left/right both side crawlers (1, 1). A first rubber seal attached to the front end part of a swinging selection shelf of the grain threshing machine (6) and a second rubber seal attached to a lower part of a rear cover of the machine are overlapped with each other by the side by which they are in contact with each other, and the fuel tank (8) is covered by them from the back.COPYRIGHT: (C)2011,JPO&INPIT【課題】燃料タンクの容積を増すことにより燃料の給油回数を大幅に少なくして、コンバインの運転を長時間、連続で行なえるものとすると共に、機体左右の重量バランスへの影響を抑えて機体の走行性能を維持する。【解決手段】脱穀装置(6)の後側の走行フレーム(3)上に搭載した燃料タンク(8)を、機体背面視において該燃料タンク(8)の主要部分を左右クローラ(1,1)の中間位置に配置すると共に、該燃料タンク(8)の両端部分を左右両側のクローラ(1,1)の上方位置近傍まで夫々左右方向に延長して形成する。また、脱穀装置(6)の揺動選別棚の先端部に取付けた第1ゴムシールと機体のリヤカバーの下部に取付けた第2ゴムシールとを、相互に接触する側を重ね合わせると共に燃料タンク(8)を背後から覆う構成とする。【選択図】図1