While on-location in Thailand, Sir Roger Moore found a cave full of bats. He couldn't resist seeking out Sir Christopher Lee, telling him what he had found and joking "Master, they are yours to command!" Lee appreciated the joke.
In his autobiography, Sir Roger Moore said that when they were filming the boat chase on the klongs, he fell in twice. The first was on purpose (because they told him not to do it), and the second time was by accident. On the second fall, Moore made the mistake of opening his eyes underwater, and saw what the local undertakers did with the bodies of the less fortunate. Conversely, this is the only Sir Roger Moore Bond movie where the Bond character is not drenched in water in some way.
The island used as the filming location for the Scaramanga's beach house (Phang Nga Bay, Thailand) is known as "James Bond Island".
One of the lowest grossing Bond movies. That fact, combined with behind-the-scenes problems, nearly made this the final Bond movie, and delayed production of the next entry in the franchise, L'Espion qui m'aimait (1977).
Prior to this movie, Hervé Villechaize was so poor that he was living out of his car in Los Angeles, California.