World Diving Federation
- Country: Italy
- Type: Sports
- Website: www.cmas.org
- Update: 05-02
The World Federation of Submersible Sports (Confédération Mondiale des Activités Subaquatiques; abbreviated CMAS) is an international sports organization founded in 1959, with an international office in Rome, Italy, that regulates the aquatic sports of scuba diving, freediving and snorkeling.
