The men's 100 metre breaststroke at the 2013 IPC Swimming World Championships was held at the Parc Jean Drapeau Aquatic Complex in Montreal from 12 to 18 August.
| Class | width=200 bgcolor=gold | Gold | width=200 bgcolor=silver | Silver | width=200 bgcolor=CC9966 | Bronze |
| SB4 | Moisés Fuentes | Ricardo Ten | Antonios Tsapatakis | |||
| SB5 | Roberto Rodriguez | Pedro Rangel | Niels Grunenberg | |||
| SB6 | Yevheniy Bohodayko | Torben Schmidtke | Nelson Crispín | |||
| SB7 | Blake Cochrane | Simon Boer | Sascha Kindred | |||
| SB8 | Andriy Kalyna | Andreas Onea | Krzysztof Paterka | |||
| SB9 | Kevin Paul | SimLin Furong | Pavel Poltavtsev | |||
| SB11 | Keiichi Kimura | Oleksandr Mashchenko | Israel Oliver | |||
| SB12 | Uladzimir Izotau | Maksym Veraksa | Sergey Punko | |||
| SB13 | Oleksii Fedyna | Mikhail Zimin | Roman Dubovoy | |||
| SB14 | Marc Evers | Yasuhiro Tanaka | Artem Pavlenko |