Roman Kejžar (born 11 February 1966 in Kranj) is a Slovenian long-distance and marathon runner.

He also set both a national record and a personal best time of 2:11:50 at the 2000 Turin Marathon, earning him a spot on the Slovenian team for the Olympics.

[2] At age thirty-four, Kejzar made his official debut for the 2000 Summer Olympics in Sydney, where he placed sixty-second out of a hundred runners in the men's marathon, with a time of 2:26:38, fourteen seconds behind Tanzania's Zebedayo Bayo.

Eight years after competing in his first Olympics, Kejzar qualified for his third Slovenian team, as a 42-year-old, at the 2008 Summer Olympics in Beijing, by placing nineteenth and reaching an A-standard time of 2:17:26 from the 2007 Berlin Marathon.

[3] He successfully finished the race in sixty-seventh place by nine seconds behind Mexico's Francisco Bautista, with a time of 2:29:37.