The 2003–04 LEN Trophy was the 12th edition of LEN's second-tier competition for men's water polo clubs.

Knockout stage

Eight Finals

Quarter-finals

Semi-finals

Final

2003–04 LEN TrophyChampions Barcelona2nd Cup

See also 2003–04 LEN Euroleague

References LEN-kupa 2003-2004 nemzetisport.hu