The men's quadruple sculls event at the 2020 Summer Olympics took place from 23 to 28 July 2021 at the Sea Forest Waterway.

The reigning medalists in the event were Germany, Australia, and Estonia.

Each National Olympic Committee (NOC) has been limited to a single boat in the event since 1912.

There were 10 qualifying places in the men's quadruple sculls:[2] This rowing event is a quadruple scull event, meaning that each boat is propelled by four rowers.

The "scull" portion means that the rower uses two oars, one on each side of the boat; this contrasts with sweep rowing in which each rower has one oar and rows on only one side.