Ninibeth Beatriz Leal Jiménez (born November 26, 1971) is a Venezuelan model, businesswoman and beauty queen who won Miss World Venezuela 1991 and Miss World 1991. She is the fourth Miss World titleholder from Venezuela.
In a pageant held in Atlanta, Georgia, she was crowned Miss World 1991 on December 28. Leanne Buckle of Australia and Diana Tilden-Davis of South Africa were her runners-up. Sandra Foster of Jamaica and Michelle McLean of Namibia completed the Top 5.
After Ninibeth fulfilled her Miss World duties, she got married and moved to Australia to continue modeling. She and her husband had two kids, Valentino and Lucciana. The couple divorced in 2008. Ninibeth is now a businesswoman still living in Australia.