PURPOSE: To inhibit bending quality of an ear part simultaneously prevent generation or growth of a crack due to the bending, by embedding a fiber layer fully circumferentially of the ear part.

CONSTITUTION: A fiber layer 9 is almost horizontally embedded in the ear part 4 of a crawler, and its internal end is interposed immediately below a core metal 1 between the core metal and tensile reinforcement material 2 to impart also a combined function of woven cloth. The fiber layer 9 being in such way as horizontally embedded to the ear part 4 of the crawler decreases bending quality, accordingly not only almost no reduction of propulsive force is caused also at travelling but contact to a frame or the like can be eliminated, resulting in the chance of few occurrence for a crack. Further a crack, even if generated by any possibility, reaches the fiber layer 9 and then is blocked its growth at said layer, thus occurrence of falling off or the like in the ear part 4 can be prevented.