Tadeusz Walenty Pelczynski (codenames: Grzegorz, Adam, Wolf, Robak; Warsaw, 14 February 1892 – 3 January 1985, London) was a Polish Army major general (general brygady), intelligence officer and chief of the General Staff's Section II (the military intelligence section).During World War II, he became chief of staff of the Home Army (ZWZ, Armia Krajowa; July 1941 – October 1944) and its deputy commander (July 1943 – October 1944).