An optical coupling structure of the present invention is configured with a lens body and a clamp. The lens body includes a lens section having the lens and a fixing section. The clamp includes a positioning section, a pressing spring, and a retaining section. The positioning section determines a position of the clamp except a position in a direction of the optical axis of the optical fiber. The pressing spring makes contact with a surface of the lens body having a normal direction matching with the end face of the optical fiber, and generates a returning force when the clamp moves in a direction opposite to the normal direction of the surface. The retaining section is formed in a portion of the clamp to press the optical fiber and retains the optical fiber not to move in a direction apart from the lens.