Roller type writing tool

The utility model provides a roller type writing tool. The writing tool comprises a pen holder, an ink feeder, a pen point and an adjusting part, wherein one end of the pen holder is provided with a writing part in which the pen point is locally inserted, and the other end of the pen holder is provided with an ink storage part; the adjusting part is used for ventilating and obstructing liquid and is located between the ink storage part and the writing part so as to prevent ink in the ink storage part from flowing into the writing part, and is connected with the ink storage part and an outside environment through a writing part air way so as to automatically balance pressure in the ink storage part; and the ink feeder is inserted into the adjusting part, and the two ends of the ink feeder is respectively in contact with ink, and the pen point is used for conducting ink to the pen point. The roller type writing tool provided by the utility model is large in ink capacity, less in residual quantity of ink and smooth and uniform to write; furthermore, if the outside temperature and pressure are changed greater, the ink is unlikely to leak; in addition, the writing tool is simple and stable in structure, high in ink use ratio and convenient to transport and use, and pressure difference resistance and temperature difference resistance can be realized, and waste and environmental pollution can be realized.