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The 2003–04 Swiss Challenge League was the first season of the Swiss Challenge League, and the 72nd season of the second tier of the Swiss football league pyramid. It began on 18 July 2003 and ended on 22 May 2004. The champions of this season, FC Schaffhausen, earned promotion to the 2004–05 Super League. SR Delémont finished last and were relegated to the Swiss 1. Liga.
Source: RSSSF Rules for classification: During the season, the winner of each confrontation return received 2 bonus points. This system will be abolished for the 2004-05 season (C) Champions; (P) Promoted; (R) Relegated Notes: