1997–98 Primeira Divisão
The 1997–98 Primeira Divisão was the 64th edition of top flight of Portuguese football. It started on 25 August 1997 with a match between Varzim and Porto, and ended on 17 May 1998. The league was contested by 18 clubs with Porto as the defending champions.
Porto won the league and qualified for the 1998–99 UEFA Champions League group stage, along with Benfica, who qualified for the second round. Braga qualified for the 1998–99 UEFA Cup Winners' Cup first round, and V. Guimarães, Sporting CP and Marítimo qualified for the 1998–99 UEFA Cup; in opposite, Leça, Varzim and Belenenses were relegated to the Liga de Honra. Mário Jardel was the top scorer with 26 goals.
Promotion and relegation
Teams relegated to [Liga de Honra]
- Espinho
- União de Leiria
- Gil Vicente
Teams promoted from Liga de Honra
- Campomaiorense
- Varzim
- Académica
Teams
Stadia and locations
| Team | Head Coach | City | Stadium | 1996–97 finish |
| Académica |  Henrique Calisto | Coimbra | Estádio Cidade de Coimbra | 3rd in Divisão de Honra |
| Belenenses |  Mladenov | Lisbon | Estádio do Restelo | 13th |
| Benfica | Manuel José | Lisbon | Estádio da Luz | 3rd |
| Boavista | Mário Reis | Porto | Estádio do Bessa | 7th |
| Braga |  Castro Santos | Braga | Estádio Primeiro de Maio | 4th |
| Campomaiorense | Bernardino Pedroto | Campo Maior | Estádio Capitão Cesar Correia | 1st in Divisão de Honra |
| Chaves | José Romão | Chaves | Estádio Municipal de Chaves | 10th |
| Estrela da Amadora | Fernando Santos | Amadora | Estádio José Gomes | 9th |
| Farense |  Paco Fortes | Faro | Estádio de São Luís | 11th |
| Leça | Rodolfo Reis | Leça da Palmeira | Estádio do Leça FC | 14th |
| Marítimo | Augusto Inácio | Funchal | Estádio dos Barreiros | 8th |
| Porto | António Oliveira | Porto | Estádio das Antas | 1st |
| Rio Ave | Carlos Brito | Vila do Conde | Estádio dos Arcos | 15th |
| Salgueiros | Carlos Manuel | Porto | Estádio Engenheiro Vidal Pinheiro | 6th |
| Sporting | Octávio Machado | Lisbon | Estádio José Alvalade | 2nd |
| Varzim | Horácio Gonçalves | Póvoa de Varzim | Estádio do Varzim Sport Club | 2nd in Divisão de Honra |
| Vitória de Guimarães | Jaime Pacheco | Guimarães | Estádio D. Afonso Henriques | 5th |
| Vitória de Setúbal | Manuel Fernandes | Setúbal | Estádio do Bonfim | 12th |