PURPOSE: An environment-friendly for construction retaining wall is provided to reduce damage to vehicle and injury of pedestrians by exposing a curved panel to the front side. CONSTITUTION: An environment-friendly for construction retaining wall comprises a retaining wall block(100), a space defining member(200) and a basis concrete part(300). The retaining wall block comprises a vertical panel(110), a curved panel(120), and a protrusion(130) and a fixing unit(140). The curved panel is extended from both ends of a vertical panel to be rounded. The protrusion is projected from one side of the curved panel. The fixing unit is projected to other side of the curved panel and has the insertion hole in which the protrusion is inserted. The space defining member comprises a horizontal part and a vertical part. The space defining member forms the space for plant between multiple retaining wall blocks.