The following is a summary of the 2005–06 season of competitive football in Switzerland.

The ninth-placed team in the 2005–06 Swiss Super League, Neuchâtel Xamax, played a two-legged play-off against the Challenge League runners-up, Sion, for a spot in the 2006–07 Super League.

Servette win 5–1 on aggregate and are promoted to the 2006–07 Challenge League.

The winner of the first drawn semi-final is considered as home team.

The final was played on 17 April 2006 and took place at Stade de Suisse, Wankdorf in the Swiss capital Bern.