Nogometni klub Železničar Maribor, commonly referred to as NK Železničar Maribor or simply Železničar, was a Slovenian football club from Maribor. They qualified for the top division of Slovenian football, the Slovenian PrvaLiga, in the 1992–93 season, but were relegated in their first season, never returning to the top level. They were one of the most successful Slovenian clubs in the Yugoslav era, winning the Slovenian Republic League four times and the Slovenian Republic Cup twice.