To effectively prevent a fore-end leak of ink in a writing implement having a ballpoint pen core body, particularly in a multi-core writing implement.

In the writing implement 1 having one or more ball-point pen core bodies 3 and 4 held in a holder tube 2 at the front end of which a tip part 7 having a fore-end opening 7a is provided, gas flow holes 22 and 23 piercing the peripheral wall 7b of the tip part 7 between the inside and the outside on the occasion of not being used are provided in the wall.