Dagger Head Box is a magic trick.
The performer/magician is joined by an assistant. The assistant's head is put in a small metal box with a hole in the front. The hole is then closed by two doors at the side of the box. The rest of the assistant's body may be clearly seen. A large sword is plunged through the centre of the box. Then, more daggers are plunged through the box from all sides. Sometimes, there is blood spurting out of the holes for effect. When the magician has finished, he opens the doors and the assistant's head has disappeared. When the process is reversed, the assistant steps away from the box, unharmed.