PURPOSE: To provide a traveling frame in a combine harvester to which a subframe situated in the rear of an operational seat, having a crawler and mounted with a grain tank is linked in a vertically swingable way, capable of preventing such an unfavorableness that the machine body as a whole goes tilted toward the grain tank side in e.g. an ill-drained paddy field, and excellent in workability.

CONSTITUTION: This traveling frame is so designed that a subframe 7 situated in the rear of an operational seat, having a crawler 3 and mounted with grain tank 8 is linked in a vertically swingable way to the main frame 6 mounted with a threshing device on a left (right) side of crawlers 2 and the operational seat on the other side of the crawlers 2. It is preferable that plural support frames 45 be projected from the inner side frame of the subframe 7 downward, a crawler frame 48 with the crawler 3 in the rear of right side stretchedly set up nearly over the lower side of the grain tank 8 axially supporting a rolling wheel 37, driving front wheel 46 and driven rear wheel 47 be supported on the support frame 4, and the rear wheel shaft 49 of the driven rear wheel 43 of the crawler 2 in the front be linked in a downwardly swingable way to the front wheel shaft 50 of the driving front wheel 46 of the crawler 3 in the rear.