An elastic crawler comprising: an elastic body in an endless shape that is wrapped round a driving wheel (100; 112; 132); cores that are embedded in the elastic body, spaced apart in an elastic body peripheral direction, and that extend in an elastic body width direction, a pair of protrusions that protrude to an elastic body inner side being formed at each core at both elastic body width direction sides sandwiching an elastic body width direction central portion of the core; CHARACTERISED BY: wheel portion support faces that are formed between the central portions of the cores that are mutually adjacent in the elastic body peripheral direction of the elastic body, the wheel portion support faces being disposed at the elastic body inner side relative to the central portions and supporting the driving wheel; and engaging recess portions that are formed at both elastic body width direction sides, sandwiching the wheel portion support faces of the elastic body, between the protrusions of the cores that are mutually adjacent in the elastic body peripheral direction, the engaging recess portions being recessed toward the elastic body outer side, and tooth portions that are provided at an outer periphery of the driving wheel (100; 112; 132) and project to the radial direction outer side being inserted into and engaged with the engaging recess portions. an elastic body in an endless shape that is wrapped round a driving wheel (100; 112; 132); cores that are embedded in the elastic body, spaced apart in an elastic body peripheral direction, and that extend in an elastic body width direction, a pair of protrusions that protrude to an elastic body inner side being formed at each core at both elastic body width direction sides sandwiching an elastic body width direction central portion of the core; CHARACTERISED BY: wheel portion support faces that are formed between the central portions of the cores that are mutually adjacent in the elastic body peripheral direction of the elastic body, the wheel portion support faces being disposed at the elastic body inner side relative to the central portions and supporting the driving wheel; and engaging recess portions that are formed at both elastic body width direction sides, sandwiching the wheel portion support faces of the elastic body, between the protrusions of the cores that are mutually adjacent in the elastic body peripheral direction, the engaging recess portions being recessed toward the elastic body outer side, and tooth portions that are provided at an outer periphery of the driving wheel (100; 112; 132) and project to the radial direction outer side being inserted into and engaged with the engaging recess portions. wheel portion support faces that are formed between the central portions of the cores that are mutually adjacent in the elastic body peripheral direction of the elastic body, the wheel portion support faces being disposed at the elastic body inner side relative to the central portions and supporting the driving wheel; and engaging recess portions that are formed at both elastic body width direction sides, sandwiching the wheel portion support faces of the elastic body, between the protrusions of the cores that are mutually adjacent in the elastic body peripheral direction, the engaging recess portions being recessed toward the elastic body outer side, and tooth portions that are provided at an outer periphery of the driving wheel (100; 112; 132) and project to the radial direction outer side being inserted into and engaged with the engaging recess portions.