chris-hansen230inset.jpgChris Hansen is known for his hidden camera work on NBC's To Catch a Predator ... trapping men in sting operations. However, the Dateline reporter has been caught on a hidden camera cheating on his wife, according to The Daily Mail.

The site claims the NBC reporter has been cheating on his wife with 30-year-old journalist Kristyn Caddell from Florida.

Hansen has been seen on camera taking Caddell to a romantic dinner ... while he's supposedly in Florida to investigate the disappearance of James "Jimmy T" Trindade for Dateline.

Hansen nor NBC have issued a comment.