To protect a writing core, a writing utensil includes: a shaft tube; a holder which is inserted through a front opening of a shaft tube and protrudes forward from a front end of the shaft tube; a writing core which is inserted through the holder while coming into contact with an inner peripheral surface of the holder and is supported by the shaft tube so as to protrude forward from a front end of the holder; and a movement direction conversion mechanism which is provided between the shaft tube and the holder and moves the holder forward relative to the shaft tube and the writing core by a force applied to the holder in the shaft tube outward radial direction.