| Qualification for championships (CONMEBOL) | 
|---|
Listed below are the dates and results for the 1986 FIFA World Cup qualification rounds for the South American zone (CONMEBOL). For an overview of the qualification rounds, see the article 1986 FIFA World Cup qualification.
A total of 10 CONMEBOL teams entered the competition. The South American zone was allocated 4 places (out of 24) in the final tournament.
South America's qualifying berths were taken by Argentina, Uruguay, Brazil and Paraguay.
Tournament Structure
The 10 teams were divided into 3 groups. The teams played against each other on a home-and-away basis. The number of teams and spots for each group were as follows:
- Group 1 had 4 teams. The group winner would qualify. The runner-up and 3rd-placed team would advance to the CONMEBOL Play-offs.
 - Groups 2 and 3 had 3 teams each. The group winners would qualify. The runners-up would advance to the CONMEBOL Play-offs.
 
In the Play-offs, the 4 teams played a in knockout tournament, with matches on a home-and-away basis. The tournament winner would qualify.
| Key to colours in group tables | |
|---|---|
| Team qualifies for the World Cup | |
| Team advances to the play-offs | |
Group 1
  | 
  | 
Group 2
  | 
  | 
Group 3
  | 
  | 
Play-offs
First round
| Team 1 | Agg. | Team 2 | 1st leg | 2nd leg | 
|---|---|---|---|---|
| Paraguay  | 
4–2 | 3–0 | 1–2 | |
| Chile  | 
5–2 | 4–2 | 1–0 | 
First leg
Second leg
Paraguay won 4–2 on aggregate and advanced to the Final Round.
Chile won 5–2 on aggregate and advanced to the Final Round.
Final round
| Team 1 | Agg. | Team 2 | 1st leg | 2nd leg | 
|---|---|---|---|---|
| Paraguay  | 
5–2 | 3–0 | 2–2 | 
First leg
Second leg
Paraguay won 5–2 on aggregate and qualified for the World Cup.
Qualified teams
The following four teams from CONMEBOL qualified for the final tournament.
| Team | Qualified as | Qualified on | Previous appearances in FIFA World Cup1 | 
|---|---|---|---|
| Group 1 winners | 30 June 1985 | 8 (1930, 1934, 1958, 1962, 1966, 1974, 1978, 1982) | |
| Group 2 winners | 7 April 1985 | 7 (1930, 1950, 1954, 1962, 1966, 1970, 1974) | |
| Group 3 winners | 30 June 1985 | 12 (1930, 1934, 1938, 1950, 1954, 1958, 1962, 1966, 1970, 1974, 1978, 1982) | |
| Final round winners | 17 November 1985 | 3 (1930, 1950, 1958) | |
- 1 Bold indicates champions for that year. Italic indicates hosts for that year.
 
Goalscorers
- 7 goals
 
- 4 goals
 
- 3 goals
 
- 2 goals
 
- 1 goal
 
 Jorge Burruchaga
 Néstor Clausen
 Ricardo Gareca
 Daniel Passarella
 Miguel Ángel Russo
 Jorge Valdano
 Silvio Rojas
 Juan Carlos Sánchez
 Careca
 Sócrates
 Zico
 Juan Carlos Letelier
 Jorge Muñoz
 Héctor Puebla
 Manuel Asisclo Cordoba
 Sergio Angulo
 Hamilton Cuvi Rivera
 Hans Maldonado
 Rogelio Delgado
 Buenaventura Ferreira
 Ramón Hicks
 Justo Jacquet
 Alfredo Mendoza
 Jorge Martín Núñez
 Vladimiro Schettina
 César Cueto
 Jorge Hirano
 Juan Carlos Oblitas
 Julio César Uribe
 José Manuel Velásquez
 Carlos Aguilera
 José Batista
 Enzo Francescoli
 Mario Saralegui
 Bernardo Añor
 Douglas Cedeño
 Pedro Febles
 Herbert Marquez
 René Torres
- 1 own goal
 
 Miguel Ángel Noro (playing against Brazil)
 Lizardo Garrido (playing against Paraguay)