Kristiansand Symphony Orchestra (KSO, Norwegian: Kristiansand Symfoniorkester) is a professional symphony orchestra in Kristiansand, Norway with approx. 70 full-time musicians. Chief conductor is Giordano Bellincampi. One of the precursors for the Symphony Orchestra was Kristiansand Byorkester, founded in 1919. It was then an amateur orchestra with some professional musicians in the ranks. In the 1980s, became the first professional string orchestra employed, and the Kristiansand Chamber Orchestra occurred.