To provide a block installed on a road or the like and a concrete structure molding installed on the road or the like capable of relieving the impact of a collision, having excellent visibility and facilitating the repair when the block and molding on the road or the like is damaged.

A traffic boundary block 1 is constituted of a concrete block main section 3 and a rubber molding 5, and the molding 5 is provided with a volt in a detachable manner in a state to cover the upper surface of the block main section 3 and the upper end of one side face 13. A color having good visibility or a pattern is provided to the molding 5 and, at the same time, glass powder or the like is adhered to the surface thereof to treat so as to have high reflectivity of light. A joint piece 9 is inserted between the moldings 5 adjacent to each other. Accordingly, the impact of a collision is relieved and, at the same time, the block and molding capable of having good visibility, also facilitating the repair and changing them to different colored ones at all times are provided.