The Men's 100 metre breaststroke SB13 swimming event at the 2004 Summer Paralympics was competed on 25 September.

[1] The result was a tie between Daniel Clausner, representing  Germany, and Andrey Strokin of  Russia, and two gold medals were awarded.

[2] 25 Sept. 2004, morning session 25 Sept. 2004, morning session 25 Sept. 2004, evening session