The ZIS-6 (Russian: ЗиС-6) is a Soviet general purpose 6×4 army cargo truck, a three-axle version of the ZIS-5 two-axle truck. It was built from 1933 until October 1941 at the Moscow Zavod imeni Stalina factory and reached a total production of 21,239.
The robust and reliable base was used for many different bodies, for example as a searchlight truck or mobile workshop. But is best known for its role as the first multiple rocket launcher in July 1941. It was built by the "Compressor" Plant's Design Office during World War II (1941–45). Very few ZIS-6 trucks survive till today.
During early World War II the ZIS-6 served as the chassis of the original "Stalin Organ" Katyusha multiple rocket launcher, the BM-13. The ZIS-6 also served as the basis for the VVS-RKKA aircraft fueller BZ-ZIS-6.