Knut Norheim Kjær (born 14 April 1956) is a Norwegian economist.
He was the first manager of the Government Pension Fund of Norway, from 1997 to 2008.
In 2008 Yngve Slyngstad became CEO of the fund.
He is currently a member of the International Advisory Council of the China Investment Corporation, a member of the investment committee of the Stichting Pensioenfonds ABP, and adviser to the Government of Singapore Investment Corporation.