UFC Brazil: Ultimate Brazil (also known as UFC 17.5) was a mixed martial arts event held by the Ultimate Fighting Championship in São Paulo, Brazil on October 16th, 1998. The event was seen on pay per view in the United States and Brazil, and was later released on home video.

• Frank Shamrock
• John Lober
• Pat Miletich
• Mikey Burnett
• Vitor Belfort
• Wanderlei Silva
• Pedro Rizzo
• Tank Abbott