The 2012 FIRS Senior Men's Inline Hockey World Championships was the 18th World Championships, an annual international inline hockey tournament. It took place between 8–14 July 2012 in Colombia.
Each team's roster for the 2012 FIRS Senior Men's Inline Hockey World Championships consisted of at least 6 skaters (forwards, and defencemen) and 2 goaltenders, and at most 14 skaters and 2 goaltenders. All sixteen participating nations, through the confirmation of their respective national associations, had to submit a roster prior to the event.
Nations
The following 16 nations qualified for the tournament. 1 nation from Australia, 6 nations from Europe, 3 nations from North American and 6 nations from South America are represented.
The seeding in the preliminary round was based on the 2012 FIRS World Championship final rankings. The teams were grouped by seeding (in parentheses is the corresponding final ranking).