The 2018 FIVB Men's Volleyball World Championship was the 19th staging of the FIVB Men's Volleyball World Championship, contested by the senior men's national teams of the members of the Fédération Internationale de Volleyball (FIVB), the sport's global governing body. The final tournament was held in Italy and Bulgaria from 9 to 30 September 2018. For the first time, the tournament was jointly-hosted by more than one country. The final six was hosted by Italy at the Pala Alpitour in Turin.

Poland defended their world title, defeating the reigning Olympic champions Brazil in straight sets at a repeat of the 2014 final. This was Poland's third title overall, and the third time in the last four editions of the World Championship that Brazil and Poland contested the final. This was also the fifth straight World Championship with Brazil reaching at least the final. United States won the 3rd place match, defeating Serbia in four sets. Bartosz Kurek from Poland was elected the MVP.

The first round match between Russia and Tunisia set the new all-time lowest-scoring record in a World Championship set since the new volleyball scoring rules were adopted, with Russia winning the second set by 25–6. The previous record was a 25–8 achieved by United States against Puerto Rico during the 2014 World Championship.

On 9 December 2015, FIVB announced that the tournament would be held in Italy and Bulgaria. For the first time the championship will take place in more than one country. The tournament will take place in six Italian cities (Bari, Bologna, Florence, Assago, Rome and Turin) and three Bulgarian cities (Ruse, Varna and Sofia).

Both Italy and Bulgaria have previously hosted the Men's World Championship. Italy last organised the 2010 edition, when Brazil claimed the title their third straight title. Italy also hosted the men's event in 1978 as well as the 2014 Women's World Championship. Moreover, Italy hosted the 1985 Men's U21 World Championship, the 1985 Women's U20 World Championship and the 2009 Boys' U19 World Championship. Bulgaria, on the other hand, hosted both the men's and women's senior editions in 1970. Both countries have also played hosts to other important volleyball competitions, including the Men's European Volleyball Championship and the World League final round.

The qualification process was a series of tournaments organised by the five FIVB confederations to decide 21 of the 24 teams which would play in the final tournament, with Italy and Bulgaria qualifying automatically as hosts and Poland also qualifying automatically as the defending champions. All remaining FIVB member associations were eligible to enter the qualifying process.

At first, 150 associations registered teams to compete in the qualification process, but 19 associations withdrew from the qualifying process after they registered and India were suspended and then expelled from taking part in the process as a punishment for internal problems in the India Volleyball Federation.^{[citation needed]}

The five regional governing bodies were allocated the remaining 21 spots; CAVB (Africa) was granted three, AVC (Asia and Oceania) four, NORCECA (North America) five, CSV (South America) two, and CEV (Europe) seven spots.