The men's 100m breaststroke events at the 2017 World Para Swimming Championships were held in Mexico City between 2–7 December.[1]
| SB4 | Li Junsheng China | Moisés Fuentes Colombia | Antonios Tsapatakis Greece | |
| SB5 | Antoni Ponce Bertran Spain | Karl Forsman Sweden | Do Thanh Hai | |
| SB6 | Nelson Crispín Colombia | Andreas Skaar Bjornstad Norway | Juan Jose Gutierrez Bermudez Mexico | |
| SB7 | Carlos Serrano Zárate Colombia | Yang Hong China | Mark Malyar Israel | |
| SB8 | Oscar Salguero Galisteo Spain | Xu Haijiao China | Federico Morlacchi Italy | |
| SB9 | Ruan Felipe Lima de Souza Brazil | Only one medalist | ||
| SB11 | Tharon Drake United States | Miroslav Smrcka Czech Republic | Mindaugas Dvylaitis Lithuania | |
| SB12 | Uladzimir Izotau Belarus | Anuar Akhmetov Kazakhstan | Andrey Afanasyev Kazakhstan | |
| SB13 | Ihar Boki Belarus | Ivan Salguero Oteiza Spain | Gerasimos Lignos Greece | |
| SB14 | Adam Ismael Wenham Norway | Robert Isak Jonsson Israel | Aymeric Parmentier Belgium | |