The Vanishing Dagger
- Blwyddyn: 1920
- Gwlad: United States of America
- Genre: Adventure
- Stiwdio: Universal Film Manufacturing Company
- Allweddair: movie serial, lost film, silent serial
- Cyfarwyddwr: J.P. McGowan, Eddie Polo, Edward A. Kull
- Cast: Eddie Polo, C. Norman Hammond, Laura Oakley, Peggy O'Day, Thelma Percy, Ray Ripley