Abstract: A reflector for a road sign and a manufacturing method thereof are provided. The road sign reflector includes a base attached to a road facility or a road surface, light-transmitting bodies mounted on the base and made of a transparent material, and a reflective layer formed on a contact surface between the light-transmitting bodies and the base and reflecting light incident into the light-transmitting bodies. The manufacturing of the road sign reflector is completed by attaching the road sign reflector to a center line and a lane. The road sign reflector can be directly attached to a guardrail and road facilities without installation of an additional post, thereby facilitating the installation work. In the road sign reflector, the reflective layer formed on the light-transmitting bodies is inwardly inserted in the base and exposed surfaces of the light-transmitting bodies are exposed to the outside of the base, thereby increasing reflecting efficiency.