The film was unearthed after the death of a cinema projectionist. The reel was in his garden shed.
It shows survivors from the famous shipwreck arriving in New York and people turning out to help them.
The Titanic sank in 1912 after hitting an iceberg. 1500 people died. The film is now to be auctioned and is expected to sell for around £7,000.
The film shows the arrival of the Carpathia, a large ship that rescued a lot of survivors from lifeboats and the sea.
Iceberg
It also includes pictures of the man who was steering the ship when she collided with the iceberg - Robert Hitchin.
The film reel will go under the auction hammer next month.
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