To suppress the occurrence of the tooth skipping of driving protrusions, and to suppress the generation of cracks on the driving protrusions.

The rubber crawler wrapped around in an endless belt shape between a driving wheel and a driven wheel comprises: a rubber crawler body 4 formed in an endless belt shape; and a plurality of driving protrusions 5 protrusively formed on an inner peripheral surface of the rubber crawler body at intervals in a rubber crawler circumferential direction, and meshed with the driving wheel and the driven wheel. The driving protrusion is equipped with base body rubber 10, and outer layer rubber 11 covering at least a fore-and-aft surface 10a turning in the rubber crawler circumferential direction of an outer surface of the base body rubber. The outer layer rubber is formed of a rubber material having lower hardness than that of the base body rubber, and the wall thickness of the rubber is gradually increased from a base end side toward a tip side of the base body rubber.