| 1997–98 LEN Champions League | |
| League: | LEN Champions League |
| Sport: | Water Polo |
| Duration: | 1997 to 5 June 1998 |
| No Of Teams: | 8 (preliminary round) |
| Playoffs: | Final Four |
| Playoffs Link: | 1997–98 LEN Champions League#Final Four (Zagreb) |
| Finals Champ: |  Posillipo (2nd title) |
| Seasonslist: | LEN Champions League |
| Seasonslistnames: | Champions League |
| Prevseason Link: | 1996–97 LEN Champions League |
| Prevseason Year: | 1996–97 |
| Nextseason Link: | 1998–99 LEN Champions League |
| Nextseason Year: | 1998–99 |
The 1997–98 LEN Champions League was the 35th edition of LEN's premier competition for men's water polo clubs. It ran from 1997 to 6 June 1998, and it was contested by 16 teams. The Final Four (semifinals, final, and third place game) took place on June 5 and June 6 in Zagreb.
| width=25 | ! | width=220 | Team |
|---|---|---|---|
| Posillipo | |||
| Pescara | |||
| HAVK Mladost | |||
 Spartak Volgograd |
| Milan Tadić, Marcello De Georgio, Tamás Kásás, Giuseppe Porzio, Francesco Postiglione, Gergely Kiss, Fabio Galasso, Francesco Porzio, Luca Giustolisi, Paolo Zizza, Dušan Popović, Gianfranco Salvati, Fulvio Di Martire, Carlo Silipo, Fabio Bencivenga, Antracite Lignano | |
| Head coach | |
| Paolo De Crescenzo |