Belgium competed at the 2004 Summer Olympics in Athens, Greece.

50 competitors, 31 men and 19 women, took part in 41 events in 14 sports.

[3][4] Qualification Legend: Q = Qualify to final; q = Qualify to semifinal "#" indicates that the score of this rider does not count in the team competition, since only the best three results of a team are counted.

Qualification Legend: FA=Final A (medal); FB=Final B (non-medal); FC=Final C (non-medal); FD=Final D (non-medal); FE=Final E (non-medal); FF=Final F (non-medal); SA/B=Semifinals A/B; SC/D=Semifinals C/D; SE/F=Semifinals E/F; R=Repechage M = Medal race; OCS = On course side of the starting line; DSQ = Disqualified; DNF = Did not finish; DNS= Did not start; RDG = Redress given The same two women competed for Belgium that did four years earlier.

Both did better in 2004 than they had in the first competition, with Kathleen Smet missing a medal by only 27 seconds.