| Noc: | GBS |
| Nocname: | Comité Olímpico da Guiné-Bissau |
| Games: | Summer Olympics |
| Year: | 2020 |
| Location: | Tokyo, Japan |
| Competitors: | 4 |
| Sports: | 3 |
| Flagbearer Open: | Taciana Cesar[1] |
| Flagbearer Close: | Augusto Midana |
| Gold: | 0 |
| Silver: | 0 |
| Bronze: | 0 |
| Appearances: | auto |
| App Begin Year: | 1996 |
Guinea-Bissau competed at the 2020 Summer Olympics in Tokyo. Originally scheduled to take place from 24 July to 9 August 2020, the Games were postponed to 23 July to 8 August 2021, because of the COVID-19 pandemic.[2] It was the nation's seventh consecutive appearance at the Summer Olympics.
The following is the list of number of competitors in the Games.
| width=120 | Sport | width=55 | Men | width=55 | Women | width=55 | Total |
|---|---|---|---|---|---|---|---|
| Athletics | 1 | 0 | 1 | ||||
| Judo | 0 | 1 | 1 | ||||
| Wrestling | 2 | 0 | 2 | ||||
| Total | 3 | 1 | 4 |
See main article: Athletics at the 2020 Summer Olympics and Athletics at the 2020 Summer Olympics – Qualification. Guinea-Bissau received universality slots from World Athletics to send two athletes (one male and one female).[3]
See main article: Judo at the 2020 Summer Olympics and Judo at the 2020 Summer Olympics – Qualification. Guinea-Bissau qualified one judoka for the women's half-lightweight category (52 kg). Rio 2016 Olympian Taciana Cesar received an African continental quota as the nation's top-ranked judoka outside of direct qualifying position on the IJF World Ranking List of June 28, 2021.[4]
See main article: article, Wrestling at the 2020 Summer Olympics and Wrestling at the 2020 Summer Olympics – Qualification. Guinea-Bissau qualified two male freestyle wrestlers, both of whom progressed to the top two of their respective events at the 2021 African & Oceania Qualification Tournament in Hammamet, Tunisia.[5]
| Athlete | Event | Round of 16 | Quarterfinal | Semifinal | Repechage | Final / | ||
|---|---|---|---|---|---|---|---|---|
| Opposition Result | Opposition Result | Opposition Result | Opposition Result | Opposition Result | Rank | |||
| Diamantino Iuna Fafé | −57 kg | L 0–3 PO | Did not advance | 15 | ||||
| Augusto Midana | −74 kg | L 1–4 SP | Did not advance | L 0–4 ST | Did not advance | 11 | ||