| Year: | 1978 |
| Broadcaster: | Danish: [[DR (broadcaster)|Danmarks Radio]]|i=no (DR) |
| Country: | Denmark |
| Preselection: | Danish: [[Dansk Melodi Grand Prix]] 1978|i=no |
| Preselection Date: | 25 February 1978 |
| Entrant: | Mabel |
| Song: | Boom Boom |
| Final Result: | 16th, 13 points |
| Prev: | 1966 |
Denmark was represented at the Eurovision Song Contest 1978 with the song "Boom Boom", written and performed by the group Mabel. The Danish participating broadcaster, Danish: [[DR (broadcaster)|Danmarks Radio]]|i=no (DR), organised the Danish: [[Dansk Melodi Grand Prix]] 1978|i=no in order to select its entry for the contest. This marked Denmark's return to Eurovision after an 11-year absence.
Danish: [[DR (broadcaster)|Danmarks Radio]]|i=no (DR) held the Danish: [[Dansk Melodi Grand Prix]] 1978|i=no on 25 February at the Tivoli Concert Hall in Copenhagen, hosted by Jørgen de Mylius. The musical director was Ole Kurt Jensen. Six songs took part with the winner being decided by votes from eight regional juries.[1]
Other participants included both Denmark's first Eurovision winner, Grethe Ingmann, and their eventual second winners, the Olsen Brothers.
| Draw | Artist | Song | Conductor | Points | Place | |
|---|---|---|---|---|---|---|
| 1 | Olsen Brothers | "San Francisco" | Ole Kurt Jensen | 37 | 2 | |
| 2 | Flair | "Du var superstar" | Peder Kragerup | 29 | 3 | |
| 3 | Daimi Gentle & Birds of Beauty | "Tornerose" | Ole Kurt Jensen | 9 | 6 | |
| 4 | Grethe Ingmann | "Eventyr" | Leif Pedersen | 23 | 5 | |
| 5 | Mabel | "Boom Boom" | Helmer Olesen | 46 | 1 | |
| 6 | Ulla Neumann | "Hvem, hvad og hvorfor ikke" | Ole Kurt Jensen | 24 | 4 |
| + Detailed Regional Jury Votes | |||||||||||
| Draw | Song | Total | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | "San Francisco" | 5 | 3 | 6 | 5 | 4 | 5 | 4 | 5 | 37 | |
| 2 | "Du var superstar" | 4 | 2 | 4 | 3 | 2 | 4 | 6 | 4 | 29 | |
| 3 | "Tornerose" | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 9 | |
| 4 | "Eventyr" | 2 | 5 | 3 | 2 | 3 | 3 | 3 | 2 | 23 | |
| 5 | "Boom Boom" | 6 | 6 | 5 | 6 | 6 | 6 | 5 | 6 | 46 | |
| 6 | "Hvem, hvad og hvorfor ikke" | 3 | 4 | 1 | 4 | 5 | 2 | 2 | 3 | 24 |
On the night of the final Mabel performed 16th in the running order, following 's "Charlie Chaplin" by Tania Tsanaklidou and preceding 's "Parlez-vous français ?" by Baccara. At the close of voting "Boom Boom" had received 13 points, placing Denmark 16th of the 20 entries.[2] The Danish jury awarded its 12 points to .[3]