Ball -point pen

The utility model relates to a ball -point pen. The inconvenient use of prior art also is unfavorable for protecting the ball -point pen nib. The utility model discloses a pen socket, refill, the one end of the pen socket is equipped with the opening, the pen socket is near being equipped with the arc recess on the open -ended lateral wall, the refill is equipped with the bulge, the bulge is made for the elasticity material, and refill all the other parts except that the bulge adopt ordinary plastics material to make, the refill is arranged in the pen socket, the bulge leans out outside the pen socket through the arc recess. The beneficial effects of the utility model are that press the bulge of refill during the use, the nib can lean out the use, and the bulge of refill popped out after the use was accomplished for the nib withdrawal facilitates the use more and preserves.