The present invention provides an optical fiber cutting device in which a scratch is formed in an outer peripheral surface of a clamped optical fiber, and the optical fiber is broken along the scratch by applying a tension force or bending stress to the optical fiber so that a cut surface becomes a mirror surface, the optical fiber cutting device comprising a collecting container capable of containing a waste fiber obtained by the cuffing, pinch rollers for conveying and collecting the waste fiber into the collecting container, and a drive mechanism for rotatingly driving the pinch rollers in response to a movement of a portion movable when cutting the optical fiber. The collecting container can be mounted and dismounted with respect to the outer container integrally formed with a device body. A slit through for setting the optical fiber is formed in the collecting container. Guide surfaces for guiding the optical fiber are formed on both outer sides of the slit. Lower ends of the guide surfaces are alternately shifted with respect to each other in an up-and-down direction.