This article shows all participating team squads at the 2012 FIVB Volleyball Men's Club World Championship, held from October 13 to 19, 2012 in Doha, Qatar.
See main article: Trentino Volley.
| Number | Player | |
| 1 | Matey Kaziyski (c) | |
| 2 |  Giacomo Sintini | |
| 3 | Emanuele Birarelli | |
| 5 | Osmany Juantorena | |
| 7 |  Raphael Vieira de Oliveira | |
| 9 | Nikolay Uchikov | |
| 10 | Filippo Lanza | |
| 12 | Mitar Tzourits | |
| 13 | Massimo Colaci (L) | |
| 14 |  Jan Štokr | |
| 16 | Andrea Bari (L) | |
| 17 | Matteo Burgsthaler |
See main article: Associação Social e Esportiva Sada.
Marcelo Méndez[2]| Number | Player | |
| 2 | Daniel Gramignoli | |
| 4 | Douglas Cordeiro | |
| 5 | Maurício Silva | |
| 6 | Túlio Nogueira | |
| 7 | William Arjona (c) | |
| 8 | Wallace de Souza | |
| 9 |  Yoandry Leal | |
| 10 | Yadier Sánchez | |
| 11 | Marcus Vinícius Acácio | |
| 14 | Rogério Silva | |
| 17 | Sérgio Nogueira (L) | |
| 18 | Filipe Ferraz |
| Number | Player | |
| 1 |  Osamn Hassn Ajab | |
| 2 | Ali Hassan Asadi | |
| 5 | Georgi Bratoev | |
| 7 | Suliman Saeed Saad (L) | |
| 8 | Mohamed Al-Oui | |
| 9 | Ali Ishaq Sherwel | |
| 10 | Valentin Bratoev | |
| 11 | Rodrigão | |
| 12 | Mubarak Dahi Waleed | |
| 13 |  Mikko Oivanen | |
| 16 |  David Lee | |
| 18 | Sirianis Méndez |
Jorge Azair[4]| Number | Player | |
| 1 | Jesús Valdés Loredo | |
| 2 | Edgar Herrera | |
| 5 | Jesús Rangel (L) | |
| 6 | Richar Lazcano | |
| 7 | Jorge Barajas | |
| 10 | Néstor Orellana | |
| 11 | Guillermo Romero | |
| 12 | Ismael Guerrero | |
| 13 | Samuel Córdoba (c) | |
| 14 | Tomás Aguilera | |
| 15 | Juan Virgen | |
| 18 | Óscar Aguirre |
See main article: VC Zenit-Kazan.
Vladimir Alekno[5]| Number | Player | |
| 1 | Matt Anderson | |
| 3 | Nikolay Apalikov | |
| 4 | Ivan Demakov | |
| 5 | Valerio Vermiglio | |
| 6 | Evgeny Sivozhelez | |
| 8 | Igor Kolodinsky | |
| 9 | Alexey Cheremisin | |
| 10 | Yury Berezhko | |
| 14 | Alexander Abrosimov | |
| 15 | Aleksey Obmochaev (L) | |
| 17 | Vladislav Babichev | |
| 18 | Maxim Mikhaylov (c) |
Jacek Nawrocki[6]| Number | Player | |
| 2 | Mariusz Wlazły (c) | |
| 4 | Daniel Pliński | |
| 5 | Wytze Kooistra | |
| 6 | Karol Kłos | |
| 8 |  Konstantin Čupković | |
| 9 | Dejan Vinčić | |
| 12 | Paweł Woicki | |
| 13 | Michał Winiarski | |
| 14 | Aleksandar Atanasijević | |
| 16 | Paweł Zatorski (L) | |
| 17 | Yosleyder Cala | |
| 18 | Michał Bąkiewicz |
Mohamed Ellakany[7]| Number | Player | |
| 1 | ||
| 2 | Ahmed Ellakany | |
| 4 | ||
| 5 | Ahmed Kabary | |
| 6 | Wael Alaydy (L) | |
| 7 | Ashraf Abouelhassan (c) | |
| 10 | Mohamed El Daabousi | |
| 11 | Ahmed Afifi | |
| 13 | Mohamed Badawy | |
| 15 | ||
| 16 | Mohamed Seif Elnasr | |
| 17 | Reda Haikal |
See main article: Al Arabi Qatar (volleyball).
Mauro Grasso[8]| Number | Player | |
| 1 | ||
| 2 | Mohamed Jumah | |
| 3 | Saeed Al-Jamaani (c) | |
| 4 | Al-Soud Abdul Aziz | |
| 6 | Christian Pampel | |
| 7 | Richard Lambourne (L) | |
| 9 | Ahmed Al Bakhet | |
| 10 | Dante Boninfante | |
| 14 | Matti Oivanen | |
| 15 | ||
| 16 | Mohamed Ibrahim | |
| 18 | Al-Hitmi Saed |