A blowgun, also called a blowpipe or blow tube, is a simple weapon consisting of a small tube for firing light projectiles, or darts. The weapon is used by inserting the dart inside the blowgun and uses the force created by one's breath to give the projectile momentum. Its propulsive power is limited by its user's respiratory muscles.

Many cultures have used this weapon, but various indigenous peoples of South East Asia, and the Amazon and Guiana regions of South America are best known for its use. The users would generally poison the darts in order to paralyse the target.