Embodiments of the invention disclose a door stopper which comprises a first part mounted on a wall and a second part mounted on a door; the first part is an iron sheet with a spring; a rotatable hook is mounted between the iron sheet and the spring; the second part is cylindrical, and is provided with a magnet at the front end; a hole facing the hook is disposed on the cylinder. With the door stopper of the invention, when the two parts are separated from each other due to counter-acting force, the hook can catch the second part so as to solve the defect that the door stopper cannot stop the door.