A total of 107 teams entered the 1978 FIFA World Cupqualification rounds, competing for a total of 16 spots in the final tournament. Argentina, as the hosts, and West Germany, as the defending champions, qualified automatically, leaving 14 spots open for competition.
The 16 spots available in the 1978 World Cup would be distributed among the continental zones as follows:
Europe (UEFA): 9.5 places, 1 of them went to automatic qualifier Germany, while the other 8.5 places were contested by 31 teams. The winner of the 0.5 place would advance to the Intercontinental Play-offs (against a team from CONMEBOL).
South America (CONMEBOL): 3.5 places, 1 of them went to automatic qualifier Argentina, while the other 2.5 places were contested by 9 teams. The winner of the 0.5 place would advance to the Intercontinental Play-offs (against a team from UEFA).
A total of 95 teams played at least one qualifying match. A total of 252 qualifying matches were played, and 723 goals were scored (an average of 2.87 per match).
(c) - qualified automatically as defending champions
Notes
For the first time, over 100 teams entered qualification for the World Cup.
Statistically, this was the most difficult World Cup to qualify for. Not counting the two automatic places and teams who withdrew before playing, 95 teams competed for 14 places (14.7%). The number of spots was increased to 24 for the next World Cup.
Tunisia's victory over Morocco on penalties was the first penalty shootout in World Cup qualification matches.