Malik Muhammad Rustam Khan Kayani (), also known as M. R. Kayani or Justice Kayani, (18 October 1902 – 15 November 1962) was a distinguished Pakistani jurist who served as Chief Justice of West Pakistan from 1958 to 1962. He is noted for his opposition to the dictatorship of General Ayub Khan.
He started his career in civil service in Punjab, British India in 1927,
Last visit
In November 1962, he embarked upon a visit to East Pakistan where he was invited by the Bar Associations of Dhaka, Rajshahi and Chittagong. He died on 15 November 1962 in Chittagong Circuit House.