Idrottsklubben Sleipner is a sports club in Norrköping, Sweden; the main sports are football and ten-pin bowling. It was founded in 1903, and named after Odin's horse Sleipnir. Currently, the club's senior men's team plays football in Division 2. They are mostly known for winning Allsvenskan in 1938, but have since been overshadowed by local rivals IFK Norrköping both locally and nationally. The club is affiliated to the Östergötlands Fotbollförbund.