To suppress the generation of burrs in a rubber crawler and to improve the productivity of the rubber crawler.

A space is formed between an outer mold 3 and an inner mold 10. An annular rubber crawler molding part is provided on the periphery of the inner mold 10. The outer mold 3 is combined with one part in the circumferential direction of the inner mold 10. Unvulcanized rubber is injected into the space between the outer mold 3 and the inner mold 10 to mold a part of an unvulcanized rubber crawler 90. The formation of the space and the injection of the unvulcanized rubber are repeated on the whole circumference of the inner mold 10 to mold the unvulcanized rubber crawler 90. The inner mold 10 and the unvulcanized rubber crawler 90 are placed in a vulcanization can to vulcanize the unvulcanized rubber crawler 90.