Division General Michał Janiszewski (June 15, 1926 – February 3, 2016) was a Polish officer and public official.

A close aide of General Wojciech Jaruzelski, he served for a number of years as his chief of cabinet. First when Jaruzelski was Minister of Defense (1972–1981). When Jaruzelski became a Prime Minister in 1981, Janiszewski was a head of the office of the Council of Ministers under him and two next Prime Ministers - Zbigniew Messner and Mieczysław Rakowski.

After Jaruzelski was elected President, Janiszewski became first chief of the Office of the President of the Republic of Poland (until December 1989 People's Republic of Poland). He was a chief of the office from September 1989 until Jaruzelski stepped down on December 22, 1990.

Janiszewski was also a member of the Military Council of National Salvation (1981–1983).