2003–04年欧洲足协盃是欧洲足协举办的第 33 届欧洲足协盃赛事。本届赛事由华伦西亚夺冠，他们于决赛击败马赛，首次夺得冠军。这亦是该队近五年来第三次晋身欧洲赛决赛，但前两次均于欧洲冠军联赛决赛中铩羽而归。
半准决赛.The first legs were played on 8 April, and the second legs were played on 14 April 2004.
准决赛.The first legs were played