The bantamweight boxing competition at the 2004 Summer Olympics in Athens was held from 17 to 29 August at Peristeri Olympic Boxing Hall.

Like all Olympic boxing events, the competition was a straight single-elimination tournament.

This event consisted of 27 boxers who have qualified for the competition through various tournaments held in 2003 and 2004.

[1] The competition began with a preliminary round on 17 August, where the number of competitors was reduced to 16, and concluded with the final on 29 August.

Both semi-final losers were awarded bronze medals.