UFC 29: Defense of the Belts was a mixed martial arts event held by the Ultimate Fighting Championship on December 16, 2000 at Differ Ariake Arena in Kōtō ward, Tokyo, Japan.

As the name implies, the card featured two title defenses, featuring Light Heavyweight Champion Tito Ortiz, and Lightweight Champion Pat Miletich.

[3] UFC 29 is notable for featuring one of the few UFC losses by future longtime Welterweight Champion Matt Hughes, who was submitted in just 20 seconds by Dennis Hallman.

The event also featured the first televised UFC appearance of Olympic silver medalist Matt Lindland.

A local ring announcer was used instead of the usual Bruce Buffer.