| Champ: |  Arthur Fils |
| Runner: |  Martin Katz German Samofalov |
| Score: | 7–5, 6–2 |
| Before Name: | French Open – Boys' doubles |
See main article: 2021 French Open.
In the 2021 French Open – Boys' doubles, Flavio Cobolli and Dominic Stricker were the defending champions,[1] but both players were no longer eligible to participate in junior events.
Arthur Fils and Giovanni Mpetshi Perricard won the title after defeating Martin Katz and German Samofalov 7–5, 6–2 in the final.