| Birth Date: | February 28, 1951 |
| Birth Place: | Nokia, Finland |
| Position: | Defence |
| Shoots: | Right |
| Played For: | KOOVEE Tappara Kölner EC Düsseldorfer EG |
| Ntl Team: | FIN |
| Career Start: | 1969 |
| Career End: | 1986 |
Hannu Wilhelm Haapalainen (February 28, 1951 – November 5, 2011) was a Finnish professional ice hockey player who played in the SM-liiga. He played for Tappara and KooVee and won five league championships. He was inducted into the Finnish Hockey Hall of Fame in 1992.