Ink Filling Tool

An ink filling tool configured to replenish a pen with a liquid ink, the pen comprising:

• an ink reservoir configured to store the liquid ink;
• a pen tip configured to be capable of being impregnated with the ink and molded into a rod shape;
• a holder part having a through hole into which the pen tip is inserted so as to be movable in the axial direction;
• and a valve mechanism interposed between the pen tip and the ink reservoir and configured to open by being pressed by the pen tip so as to open a communication path connecting the ink reservoir to the pen tip,
• the ink filling tool comprising:
• an ink tank having an internal space configured to store the liquid ink;
• and
• a cylindrical nozzle having an inner hole communicating with the internal space of the ink tank, the nozzle being insertable into the through hole, wherein
• the nozzle is configured to be capable of pressing the valve mechanism in a state of being inserted into the through hole, and
• the nozzle comprises an ink circulating part configured to communicate the inner hole with an outside in a direction orthogonal to the axis of the nozzle.