To scrape and discharge earth and sand or snow deposited on a truck frame by projectingly providing a scraping member to discharge earth and sand or snow on a non-ground-contact side of a rubber crawler belt in which cores are embedded in parallel in an annular direction at the pitch capable of engagement with a drive tumblers.

A rubber crawler belt 20 comprises a plurality of annular wire ropes 21, a plurality of cores 22 arranged thereon in parallel in an annular direction with equal intervals at the pitch to be engaged with drive tumblers 13, and a rubber 22 which is integratedly covered therewith. A scraping member 26 comprises two plates 26a, 26a, and one plate corresponds to the crawler advancing direction and the other corresponds to the retracting direction, and both are inclined by the angle α from the axis in the direction of the crawler width. During the traveling, the forward plate 26a in the traveling direction can scrape earth and sand or snow deposited on a truck frame, the earth and sand or snow flows in the direction of the arrow A along the inclined plate 26a, and is discharged out of the rubber crawler belt 20.