A scrap collector for an optical fiber cutter for collecting an optical fiber scrap cut out to be discarded, the scrap collector comprising: a scrap receptacle attached to a cutter main body; and an optical fiber feeding mechanism provided in the scrap receptacle, the optical fiber feeding mechanism comprising: a lower roller for receiving a tip portion of an optical fiber, the tip portion being cut out to be discarded; an upper roller capable of being raised away from and lowered toward the lower roller, the upper roller causing the tip portion of the optical fiber to be held by and between the upper roller and the lower roller and advancing the tip portion into the scrap receptacle; and a roller holding mechanism for forming, in a state in which the upper roller and the lower roller are not actuated, a clearance (h) enough to keep the upper roller and the lower roller from holding the optical fiber therebetween, and lowering the upper roller in accordance with rotation of any one of the upper roller and the lower roller to cause the upper roller and the lower roller to hold the optical fiber therebetween characterized in that the roller holding mechanism comprises a roller holding member loosely fitted to a shaft (18a, 19a) of any one of the upper roller and the lower roller, the roller holding member is formed in an approximately rectangular shape having two short sides and two long sides corresponding to two pairs of opposite sides, the roller holding member comprises a circular arc surface with a center thereof at the shaft (18a, 19a) of the one roller, the circular arc surface being formed by at least one of the two short sides, the roller holding member is configured to naturally hang down with a longitudinal direction thereof vertically oriented when no external force acts on the roller holding member, and the circular arc surface of the roller holding member is in contact with the other of the upper roller and the lower roller when the roller holding member naturally hangs down. a scrap receptacle attached to a cutter main body; and an optical fiber feeding mechanism provided in the scrap receptacle, the optical fiber feeding mechanism comprising: a lower roller for receiving a tip portion of an optical fiber, the tip portion being cut out to be discarded; an upper roller capable of being raised away from and lowered toward the lower roller, the upper roller causing the tip portion of the optical fiber to be held by and between the upper roller and the lower roller and advancing the tip portion into the scrap receptacle; and a roller holding mechanism for forming, in a state in which the upper roller and the lower roller are not actuated, a clearance (h) enough to keep the upper roller and the lower roller from holding the optical fiber therebetween, and lowering the upper roller in accordance with rotation of any one of the upper roller and the lower roller to cause the upper roller and the lower roller to hold the optical fiber therebetween characterized in that the roller holding mechanism comprises a roller holding member loosely fitted to a shaft (18a, 19a) of any one of the upper roller and the lower roller, the roller holding member is formed in an approximately rectangular shape having two short sides and two long sides corresponding to two pairs of opposite sides, the roller holding member comprises a circular arc surface with a center thereof at the shaft (18a, 19a) of the one roller, the circular arc surface being formed by at least one of the two short sides, the roller holding member is configured to naturally hang down with a longitudinal direction thereof vertically oriented when no external force acts on the roller holding member, and the circular arc surface of the roller holding member is in contact with the other of the upper roller and the lower roller when the roller holding member naturally hangs down. a lower roller for receiving a tip portion of an optical fiber, the tip portion being cut out to be discarded; an upper roller capable of being raised away from and lowered toward the lower roller, the upper roller causing the tip portion of the optical fiber to be held by and between the upper roller and the lower roller and advancing the tip portion into the scrap receptacle; and a roller holding mechanism for forming, in a state in which the upper roller and the lower roller are not actuated, a clearance (h) enough to keep the upper roller and the lower roller from holding the optical fiber therebetween, and lowering the upper roller in accordance with rotation of any one of the upper roller and the lower roller to cause the upper roller and the lower roller to hold the optical fiber therebetween characterized in that the roller holding mechanism comprises a roller holding member loosely fitted to a shaft (18a, 19a) of any one of the upper roller and the lower roller, the roller holding member is formed in an approximately rectangular shape having two short sides and two long sides corresponding to two pairs of opposite sides, the roller holding member comprises a circular arc surface with a center thereof at the shaft (18a, 19a) of the one roller, the circular arc surface being formed by at least one of the two short sides, the roller holding member is configured to naturally hang down with a longitudinal direction thereof vertically oriented when no external force acts on the roller holding member, and the circular arc surface of the roller holding member is in contact with the other of the upper roller and the lower roller when the roller holding member naturally hangs down.