The mixed pairs BC4 boccia event at the 2020 Summer Paralympics was contested between 2 and 4 September 2021 at the Ariake Gymnastics Centre.

The competition started off with a pools stage, containing 2 pools with 5 teams each, and was followed by the semifinals where the winners moved to the finals to fight for gold and the losers went to the bronze medal match to fight for bronze.

The pools (or can be known as a group stage) were played between 2 and 3 September 2021.

The top two teams in each pool qualified for the semi-finals.

[2] The knockout stage was played on 4 September.