The 1st Missouri Field Battery was a field artillery battery that served in the Confederate States Army during the American Civil War. The battery was formed by Captain Westley F. Roberts in Arkansas in September 1862 as Roberts' Missouri Battery and was originally armed with two 12-pounder James rifles and two 6-pounder smoothbore guns. The unit fought in the Battle of Prairie Grove on December 7, as part of a Confederate offensive. Roberts' Battery withdrew after the battle and transferred to Little Rock, Arkansas, where Roberts resigned and was replaced by Lieutenant Samuel T. Ruffner.