The 1978 FIFA World Cup UEFA–CONMEBOL qualification play-off was a two-legged home-and-away tie between the winners of UEFA Group 9, Hungary, and the last-placed team of the CONMEBOL final round, Bolivia.

The matches were played on 29 October and 30 November 1977 in Budapest and La Paz, respectively.

[1] After beating Bolivia in both matches (6–0 and 3–2), Hungary won 4–0 on points (9–2 on aggregate) and therefore qualified for the 1978 World Cup in Argentina.

[2] It was Bolivia's closest attempt to qualify for the World Cup, until the country secured a place sixteen years later.