The purpose of the present invention is to suppress deformation of each cord layer arranged inside a rubber crawler and to suppress lateral shift of the rubber crawler during travel. A rubber crawler (10) having: a rubber belt (12); a main cord layer (24) arranged inside the rubber belt (12) and formed by main cords (20) that extend in the crawler circumferential direction; a bias cord layer (26) arranged further on the crawler outer circumferential side than the main cord layer (24) and formed by bias cords (28) that extend diagonally relative to the crawler circumferential direction; a bias cord layer (30) arranged between the bias cord layer (26) and the main cord layer (24) and formed by bias cords (32) that extend diagonally relative to the crawler circumferential direction and intersect the bias cords (28); and a reinforcing cord layer (34) arranged between the bias cord layer (26) and the bias cord layer (30) and formed by reinforcing cords (36) that extend along the crawler width direction.