Abstract: A self-destructing syringe includes an elliptic needle cylinder, a plunger, a needle holder and a needle. A handle is provided on one end of the plunger, and a piston is provided on the other end of the plunger. The handle is engaged with the piston by a plunger body. There is a hole on the bottom center of the needle cylinder, which is used to mount the needle holder. The holder is mounted on the needle cylinder by the piston located on the bottom of the needle cylinder. The plunger body has a breakable region. The needle cylinder and the needle cap are incorporate, on which a disposable destructing device is provided.