Pawel‚ Marina Nastula (born 26 June 1970 in Warszawa) is a Polish heavyweight fighter in mixed martial arts, who last competed in the PRIDE Fighting Championships, a Japanese MMA organization. He was the 1995 and 1997 Judo World Champion, and 1996 gold medallist at the Olympic Games in Atlanta, Georgia, winning those titles in the U95kg weight category.

Nastula received a tough welcome to the PRIDE organisation, immediately facing two of PRIDE's top heavyweight contenders and seasoned professionals in Antonio Rodrigo Nogueira and Aleksander Emelianenko. Nastula wasted little time lamenting these losses. In his 3rd match in July 2006, Nastula made easy work of previously unbeaten MMA professional Edson Drago.

Nastula is the not the first judo Olympic gold medalist to compete in PRIDE; he follows Hidehiko Yoshida and Makoto Takimoto among others. In addition to the 1996 Summer Olympics, Nastula had won many European and World competitions, and was considered one of the top judo players in the world. According to PRIDE's promotion, he also went for 312 consecutive wins over a period of 1,220 days, a monumental feat.

Nastula suffered a defeat to Pride Grand Prix finalist Josh Barnett by ankle lock at PRIDE 32: The Real Deal. It was later announced that he failed his NSAC-administered drug test. Nastula tested positive for the banned substance nandrolone as well as banned stimulants phenylpropanolamine, pseudoephedrine, and ephedrine. Nastula has denied the veracity of the test results, however, claiming that the stimulants were absorbed into his system from over-the-counter supplements and that nandrolone, a mass-building substance, would not have been useful to him as he has not gained any muscle mass since coming to PRIDE.