<p>A core bar for a rubber crawler capable of enhancing the durability of the rubber crawler by preventing end-cutting phenomenon by cracking generated at the end of the core bar in a crawler lateral direction of the core bar buried in the rubber crawler when the rubber crawler rides over curbstone at the road shoulder of a paved road and stones and obstacles on an irregular ground and is pressed in a lateral direction. In the core bar (1) constituting the rubber crawler (3) and buried in a rubber crawler body (3a), an enlargement width part (2) is formed by elongating the longitudinal end part of the core bar (1) to the outside of the width dimension of the core bar.</p>
