| Year: | 2004 |
| Gender: | men's |
| Division: | Division III |
| Teams: | 9 |
| Frozenfourarena: | Kreitzberg Arena |
| Frozenfourcity: | Northfield, Vermont |
| Champions: | Middlebury Panthers |
| Titlecount: | 6th |
| Champgamecount: | 6th |
| Champffcount: | 8th |
| Runnerup: | St. Norbert Green Knights |
| Gamecount: | 1st |
| Runnerffcount: | 2nd |
| Semifinal1: | Norwich Cadets |
| Frozenfourcount: | 6th |
| Semifinal2: | Plattsburgh State Cardinals |
| Frozenfourcount2: | 9th |
| Coach: | Bill Beaney |
| Coachcount: | 6th |
| Mopteam: | not awarded |
| Attendance: | 13,490 |
The 2004 NCAA Division III Men's Ice Hockey Tournament was the culmination of the 2003–04 season, the 21st such tournament in NCAA history. It concluded with Middlebury defeating St. Norbert in the championship game 1-0 in overtime. All First Round and Quarterfinal matchups were held at home team venues, while all succeeding games were played in Northfield, Vermont.
The following teams qualified for the tournament. Automatic bids were offered to the conference tournament champion of seven different conferences with one at-large bid for the best remaining team from each region.
| East | West | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seed | School | Conference | Record | Berth Type | Appearance | Last Bid | Seed | School | Conference | Record | Berth Type | Appearance | Last Bid |
| 1 | Norwich | ECAC East | 23–3–0 | Tournament Champion | 7th | 2003 | 1 | St. Norbert | NCHA | 25–2–2 | Tournament Champion | 6th | 2003 |
| 2 | Middlebury | NESCAC | 24–3–0 | Tournament Champion | 10th | 2003 | 2 | Wisconsin–River Falls | NCHA | 20–5–4 | At–Large | 10th | 2003 |
| 3 | Plattsburgh State | SUNYAC | 22–4–3 | Tournament Champion | 12th | 2002 | 3 | St. Thomas | MIAC | 17–7–3 | Tournament Champion | 11th | 2002 |
| 4 | Curry | ECAC Northeast | 24–3–1 | At–Large | 1st | Never | |||||||
| 5 | Wentworth | ECAC Northeast | 16–8–4 | Tournament Champion | 4th | 2003 | |||||||
| 6 | Hobart | ECAC West | 15–7–5 | Tournament Champion | 1st | Never | |||||||
The tournament featured four rounds of play. All rounds were Single-game elimination. For the three eastern Quarterfinals the teams were seeded according to their rankings with the top three teams serving as hosts. For the western quarterfinal, the top-ranked team awaited the winner of a play-in game between the lower-ranked teams.
Note: * denotes overtime period(s)
| Conference |
| Record | Win % | Frozen Four | Championship Game | Champions | |
|---|---|---|---|---|---|---|---|
| NCHA | 2 | 3–2 | 1 | 1 | - | ||
| MIAC | 2 | 0–2 | - | - | - | ||
| NESCAC | 1 | 3–0 | 1 | 1 | 1 | ||
| ECAC East | 1 | 1–1 | 1 | - | - | ||
| SUNYAC | 1 | 1–1 | 1 | - | - | ||
| ECAC West | 1 | 0–1 | - | - | - | ||
| ECAC Northeast | 1 | 0–1 | - | - | - |