PURPOSE: A boundary stone is provided to minimize deterioration by preventing inner concrete from being in contact with acid rain by an outer layer. CONSTITUTION: A boundary stone comprises a body(120), an outer layer(140), and an indication unit(160). The body is made of concrete. The outer layer is formed by mixing wooden flour and plastic and is formed on the outer surface of the body. The indication unit is formed in one side of the outer layer and indicates information for a driver and a pedestrian.
