Justice Irshad Hasan Khan (Urdu : ارشاد حسن خان) (born 7 January 1937) was Chief Justice of the Supreme Court of Pakistan from 26 January 2000 to 6 January 2002. He took his oath under PCO (Provisional Constitutional Order) which was promulgated by General Pervez Musharraf following a military takeover in Pakistan. Subsequently, it was Mr Irshad who validated the military takeover by invoking the doctrine of necessity in his supreme court ruling of 12 May 2000.