| Competition: | FIVB World Championship |
| Continent: | World |
| Gender: | Men |
| Year: | 1966 |
| Size: | 200px |
| Dates: | 30 August – 11 September |
| Opened: | Antonín Novotný |
| Teams: | 22 |
| Venues: | 5 |
| Cities: | 5 |
| Champions: | TCH |
| Title Number: | 2 |
| Last: | 1962 FIVB Volleyball Men's World Championship |
| Next: | 1970 FIVB Volleyball Men's World Championship |
The 1966 FIVB Men's World Championship was the sixth edition of the tournament, organised by the world's governing body, the FIVB. It was held from 30 August to 11 September 1966 in Czechoslovakia.
For the first time the teams were restricted to 24. First 12 teams from 1962 World Championship (including host country) and 3 teams from each continent (Europe, Asia, America and Africa) were qualified to 1966 edition.
| Means of qualification | Date | Host | Vacancies | Qualified | |
|---|---|---|---|---|---|
| Host Country | 1 | ||||
| 1962 FIVB Volleyball Men's World Championship | 12–26 October 1962 | 11 | |||
| 1963 Men's European Volleyball Championship | 21 Oct – 2 Nov 1963 |  Romania | 5 | ||
| Volleyball at the 1963 Pan American Games | 24 Apr – 3 May 1963 |  São Paulo | 2 | ||
| Asian Qualifier | Unknown | Unknown | 2 | ||
| African Qualifier | Unknown | Unknown | 1 | ||
| Total | 22 | ||||
* Only Morocco from Africa confirmed participation, Belgium and Finland replaced the other African teams. Mexico, Israel and Morocco were replaced by Cuba, Denmark and West Germany. Also Argentina and North Korea did not arrive for the Championship but there were no more European teams to replace them.
| Pool A and Final round | Pool B | |
|---|---|---|
| Prague, Czechoslovakia | Nitra, Czechoslovakia | |
| Pool C | Pool D | |
| České Budějovice, Czechoslovakia | Jihlava, Czechoslovakia | |
| Final round | ||
| Pardubice, Czechoslovakia |
Location: Prague
Location: Nitra
Location: České Budějovice
Location: Jihlava
The results and the points of the matches between the same teams that were already played during the first round are taken into account for the final round.
Location: Prague
Location: Pardubice
Location: Pardubice
| Rank | Team | |
|---|---|---|
| align=center | ||
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| align=center | 4 | |
| align=center | 5 | |
| align=center | 6 | |
| align=center | 7 | |
| align=center | 8 | |
| align=center | 9 | |
| align=center | 10 | |
| align=center | 11 | |
| align=center | 12 | |
| align=center | 13 | |
| align=center | 14 | |
| align=center | 15 | |
| align=center | 16 | |
| align=center | 17 | |
| align=center | 18 | |
| align=center | 19 | |
| align=center | 20 | |
| align=center | 21 | |
| align=center | 22 | |