The 2003–04 Greek Basket League season was the 64th season of the Greek Basket League, the highest tier professional basketball league in Greece.

It was also the 12th season of Greek Basket League championship that was regulated by HEBA (ESAKE).

[1] The clubs Irakleio and Ilysiakos were relegated to the Greek A2 League, along with Peristeri, which was relegated because it faced financial problems.

[2] The top scorer of the league was Nestoras Kommatos.

Source: esake.gr, galanissportsdata.com Archived 2014-07-08 at the Wayback Machine