A blowgun, which is used for firing bullets, comprising: a grip which is comprised a loading gate, a lead
pipe, and a guiding
flange; a trigger which is installed slidably at the grip, and a interference bar is installed at a part of the trigger, which is formed in the inner of the grip; a
mouthpiece which is comprised a tubular part at one end thereof and a conical part at another end thereof; a
barrel; a pushing bar which is installed slidably in the lead
pipe and can be slid between the
mouthpiece and the
barrel; and a first
recoil spring which is installed in the lead
pipe; wherein the lead pipe is formed at the rear of the
barrel and through inner of the grip; the loading gate is connected to the lead pipe; the guiding
flange is installed in the grip; the tubular part is coupled together with the lead pipe; and during an interval the trigger being compressed, the interference bar of the trigger brings the pushing bar to approach the
mouthpiece and to compress the first
recoil spring until a chamber which is connected to the loading gate between the pushing bar and the barrel is enough for containing the bullet, and then the first
recoil spring returns and brings the pushing bar to approach the barrel and to push the bullet into the barrel while the interference bar contacts with the guiding
flange and releases the pushing bar.