The men's 3 kilometres walk event was part of the track and field athletics programme at the 1920 Summer Olympics.

Twenty-two race walkers from twelve nations competed.

At first Donato Pavesi bettered the record in the first semifinal with 13:46.8 minutes.

In the second semifinal his fellow countryman Ugo Frigerio improved the record with 13:40.2 minutes.

In the final Frigerio again set a new Olympic record with 13:14.2 minutes.