An optical fiber cutter includes a main body including a fiber fixing portion, and a moving portion including a blade for scratching the optical fiber, the moving portion being attached to the main body to be movable between a first position and a second position, the first position being an initial position before the optical fiber is scratched, the second position being a position after the optical fiber is scratched. The fiber fixing portion is configured to move the optical fiber such that the optical fiber fixed to the fiber fixing portion does not cross a movement range when the blade portion moves from the second position to the first position, and such that a cleaved surface of the optical fiber after cleaving is positioned in a direction away from the blade portion along an axial direction of the optical fiber.