1997–98 LEN Champions League
The 1997–98 LEN Champions League is the 35th edition of LEN's premier competition for men's water polo clubs. It ran from 1997 to 6 June 1998, and it is contested by 16 teams. The Final Four took place on June 5 and June 6 in Zagreb.
Preliminary round
| Key to colors in group tables |
| Group winners and runners-up advanced to [|Final four] |
Blue Group
Red Group
Final Four ([Zagreb])
Final standings
| Team | |
 Posillipo | |
| Pescara | |
 HAVK Mladost | |
 Spartak Volgograd |