1978 NCAA Division II Men's Ice Hockey Tournament

The 1978 NCAA Men's Division II Ice Hockey Tournament involved 4 schools playing in single-elimination play to determine the national champion of men's NCAA Division II college ice hockey. A total of 4 games were played, hosted by American International College.

Merrimack, coached by Thom Lawler, won the national title with a 12–2 victory in the final game over Lake Forest.

Jim Toomey, of Merrimack, was named the Most Outstanding Player and was the high scorer of the tournament with seven points (1 goal, 6 assists).

Bracket
* Overtime
 * Third Place Game: Mankato State 5, Elmira 3

All-Tournament Team

 * G: Gilles Moffet (Merrimack)
 * D: Dean Fraser (Merrimack)
 * D: Ron Bisplinghoff (Elmira)
 * F: Jim Toomey* (Merrimack)
 * F: John Keeney (Elmira)
 * F: John Pratt (Lake Forest)