| Competition: | Campeonato Ecuatoriano de Fútbol |
| Season: | 1978 |
| Relegated: | LDU Quito Manta LDU Portoviejo Valdez |
| Continentalcup1: | Copa Libertadores |
| Continentalcup1 Qualifiers: | El Nacional Técnico Universitario |
| Matches: | 192 |
| Total Goals: | 483 |
| Prevseason: | 1977 |
| Nextseason: | 1979 |
The 1978 Campeonato Ecuatoriano de Fútbol de la Serie A was the 20th national championship for football teams in Ecuador.
The number of teams for this season was played by 12 teams. Bonita Banana and Valdez promoted as winners of First Stage of Serie B.
| Club | City | |
|---|---|---|
| Guayaquil | ||
| Machala | ||
| Cuenca | ||
| Quito | ||
| Quito | ||
| Guayaquil | ||
| Portoviejo | ||
| Quito | ||
| Manta | ||
| Ambato | ||
| Quito | ||
| Milagro |