BALLPOINT PEN TIP, BALLPOINT PEN REFILL, AND BALLPOINT PEN

The ballpoint pen tip (40) comprises: a ball (42) having a diameter of 0.5 mm or less; and a tip body (50) that holds the ball, wherein the tip body has a ball holding chamber (52) that holds the ball, a rear hole (57) located rearward of the ball holding chamber, an ink flow hole (62) that allows the ball holding chamber and the rear hole to communicate with each other, and an ink flow groove (64) extending in a radial direction (dr) from the ink flow hole, opening to the ball holding chamber, and not reaching the rear hole, a ratio (A/B) of an ink consumption A per 100 m of handwriting to a diameter B of the ball is 200 mg/mm or more and 800 mg/mm or less, and when a front end (64a) of the ink flow groove is set as a start point S1 and a position of 0.3 mm rearward from the front end (62a) of the ink flow hole is set as an end point S2, a volume of a first space (SA) in the ink flow hole and the ink flow groove from the start point to the end point is 0.02 mm3 or more.