The Men's 50 metre butterfly S5 swimming event at the 2004 Summer Paralympics was competed on 22 September. It was won by He Junquan, representing .

1st round

Qualified for final round

Heat 1 22 Sept. 2004, morning session Rank Athlete Time Notes1 37.40 WR2 39.95 3 41.18 4 50.80 5 51.44

Heat 2 22 Sept. 2004, morning session Rank Athlete Time Notes1 39.10 2 40.26 3 44.15 4 46.27 5 47.90 DSQ

Final round

22 Sept. 2004, evening session Rank Athlete Time Notes 37.50 39.39 39.94 4 40.44 5 41.99 6 46.08 7 46.53 8 51.72

References