Attilio Mattei (born 16 September 1902) was an Italian professional footballer who played as a defender.
He played for 4 seasons (47 games, no goals) in the Serie A for A.S.
Roma.
His younger brothers Augusto Mattei and Aldo Mattei played football professionally.
To distinguish them, Attilio was referred to as Mattei I, Augusto as Mattei II and Aldo as Mattei III.