Robert "Big Mojo" Elem (January 22, 1928 – February 5, 1997) was an American Chicago blues bass guitarist and singer.
[2] Although he recorded only one studio album in his long career, Elem was a part of the Chicago blues scene for over forty years.
He variously backed Arthur "Big Boy" Spires, Lester Davenport, Freddie King, Magic Sam, Junior Wells, Shakey Jake Harris, Jimmy Dawkins, Luther Allison, and Otis Rush.
To avoid being in a large batch of jobbing rhythm guitarists all seeking work, Elem moved over to playing the electric bass guitar.
In 1956, this instrument was something of a rarity in Chicago, and Elem formed a band with the harmonica player Earl Payton, and a young Freddie King on lead guitar.