PURPOSE: An apparatus for manufacturing optical fiber gratings is provided to variously adapt the array gaps of the optical fiber gratings to the longitudinal direction of the optical fiber gratings by adjusting the array gaps of the optical fiber gratings. CONSTITUTION: An unwinding pulley(130) unwinds optical fiber by rotation. A winding pulley(140) winds the unwound optical fiber by rotation. A motor drives the rotation of the unwinding pulley. An aligning unit is installed between the unwinding pulley and the winding pulley and aligns the optical fiber. A light radiating unit selectively radiates light to the aligned optical fiber to form gratings in the optical fiber. A controlling unit(180) controls the drive of the motor.
