The Southern Main Line (Swedish: Södra stambanan) is a 483-kilometre (300 mi) long electrified railway between Malmö and Katrineholm in Sweden. The first parts of the line opened in 1856 between Malmö and Lund, and the last parts in 1874. The line entirely consists of double track. Today high-speed X2000 trains travel at 200 kilometres per hour (120 mph) for large parts of the way.
Around year 2020 a new high-speed line is planned to be opened between Linköping and Södertälje. It is called Ostlänken and will cut travel time by 40 minutes. It is also planned to increase the permitted speed to 250 kilometres per hour (160 mph) between Nässjö and Hässleholm around 2020.