The men's horizontal bar was an artistic gymnastics event held as part of the gymnastics programme at the 1904 Summer Olympics.

It was the second time the event was held at the Olympics.

An unknown number of gymnasts competed, only five are known at present.

[1] Anton Heida and Edward Hennig tied for first, with George Eyser third.

[2] Each gymnast performed three exercises on the parallel bars, all voluntary in design.