2003–04 TFF First League

The 2003–04 Turkish Second League Category A was the second-level football league of Turkey and the 41st season since its establishment in 1963–64. At the end of the season in which 18 teams competed in a single group, Sakaryaspor, Erciyesspor and B.B. Ankaraspor, which finished the league in the first three places, were promoted to the upper league, while Adana Demirspor, Göztepe and İzmirspor, which were in the last three places, were relegated.