Swimming at the 2017 World Aquatics Championships – Men's 4 × 100 metre medley relay
The Men's 4 × 100 metre medley relay competition at the 2017 World Championships was held on 30 July 2017.
Records
Prior to the competition, the existing world and championship records were as follows.Results
Heats
The heats were held at 10:27.Final
The final was held at 19:25.| Rank | Lane | Nation | Swimmers | Time | Notes |
| 4 | Matt Grevers Kevin Cordes Caeleb Dressel Nathan Adrian | 3:27.91 | |||
| 6 | Chris Walker-Hebborn Adam Peaty James Guy Duncan Scott | 3:28.95 | NR | ||
| 3 | Evgeny Rylov Kirill Prigoda Aleksandr Popkov Vladimir Morozov | 3:29.76 | NR | ||
| 4 | 5 | Ryosuke Irie Yasuhiro Koseki Yuki Kobori Shinri Shioura | 3:30.19 | AS | |
| 5 | 2 | Guilherme Guido João Gomes Júnior Henrique Martins Marcelo Chierighini | 3:31.53 | ||
| 6 | 1 | Xu Jiayu Yan Zibei Li Zhuhao Yu Hexin | 3:31.65 | ||
| 7 | 7 | Richárd Bohus Dániel Gyurta Kristóf Milák Dominik Kozma | 3:32.13 | NR | |
| 8 | 8 | Mikita Tsmyh Ilya Shymanovich Yauhen Tsurkin Artsiom Machekin | 3:33.63 | NR |