The men's middleweight boxing event at the 2020 Summer Olympics is scheduled to take place between 26 July and 7 August 2021 at the Ryōgoku Kokugikan.

The 2016 Olympic champion, Arlen López of Cuba, has moved up to the light-heavyweight class for the 2020 Games.

A National Olympic Committee (NOC) could enter only 1 qualified boxer in the weight class.

There were 24 quota places available for the men's middleweight, allocated as follows:[2] In addition, a Refugee Olympic Team invitation was made to Eldric Sella, bringing the total number of boxers in the class to 25.

Judges consider "number of blows landed on the target areas, domination of the bout, technique and tactical superiority and competitiveness."