The present invention discloses a fountain pen ink replenishing device. A working chamber is installed on a top end surface of the main body, and a supporting slide plate installed symmetrically on the left and right is slidably installed in the working chamber. A pinching mechanism is installed in the plate, and a top fixing block is fixedly installed at the top end of the support slide plate. An ink replenishing mechanism is installed in the top fixing block, and the present invention is a fountain pen. Ink can be automatically replenished, which avoids the problem of ink overflowing and dirtying hands while sucking the ink artificially, and at the same time, automatically stirring the ink uniformly to prevent ink precipitation. In addition, this device has a simple transmission structure and is convenient for maintenance. [Selection] Figure 1
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