The finals and the qualifying heats of the men's 100 metre breaststroke event at the 1998 World Aquatics Championships were held on Monday 12 January 1998 in Perth, Western Australia.
| Men's 100 metre breaststroke at the 1998 FINA World Championships | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Date | 12 January 1998 | |||||||||
| Competitors | 33 | |||||||||
| Winning time | 1 minute 1.34 seconds | |||||||||
| Medalists | ||||||||||
| ||||||||||
A Final
edit| Rank | Name | Time |
|---|---|---|
 |
 Frédérik Deburghgraeve (BEL) |
1:01.34 |
 |
 Zeng Qiliang (CHN) |
1:01.76 |
 |
 Kurt Grote (USA) |
1:01.93 |
| 4 |  Phil Rogers (AUS) |
1:02.01 |
| 5 |  Domenico Fioravanti (ITA) |
1:02.13 |
| 6 | Simon Cowley (AUS) |
1:02.47 |
| 7 |  Károly Güttler (HUN) |
1:02.53 |
| 8 |  Mark Warnecke (GER) |
1:03.11 |
B Final
edit| Rank | Name | Time |
|---|---|---|
| 9 | Jens Kruppa (GER) |
1:02.62 |
| 10 |  Daniel Málek (CZE) |
1:03.09 |
| 11 |  Andrey Korneyev (RUS) |
1:03.15 |
| 12 |  Aleksandr Gukov (BLR) |
1:03.16 |
| 13 |  Richard Maden (GBR) |
1:03.27 |
| 14 |  Benno Kuipers (NED) |
1:03.31 |
| 15 |  Patrick Schmollinger (AUT) |
1:03.33 |
| 16 | Jeremy Linn (USA) |
1:03.54 |
Qualifying heats
edit| Rank | Name | Time |
|---|---|---|
| 1 | Frédérik Deburghgraeve (BEL) |
1:01.99 |
| 2 | Domenico Fioravanti (ITA) |
1:02.18 |
| 3 | Kurt Grote (USA) |
1:02.22 |
| 4 | Zeng Qiliang (CHN) |
1:02.34 |
| 5 | Phil Rogers (AUS) |
1:02.45 |
| 6 | Simon Cowley (AUS) |
1:02.48 |
| 7 | Károly Güttler (HUN) |
1:02.75 |
| 8 | Mark Warnecke (GER) |
1:02.83 |
| 9 | Jeremy Linn (USA) |
1:02.84 |
| 10 | Jens Kruppa (GER) |
1:02.85 |
| 11 | Benno Kuipers (NED) |
1:02.92 |
| 12 | Richard Maden (GBR) |
1:02.99 |
| 13 | Patrick Schmollinger (AUT) |
1:03.00 |
| 14 | Andrey Korneyev (RUS) |
1:03.01 |
| 15 | Aleksandr Gukov (BLR) |
1:03.19 |
| 16 | Daniel Málek (CZE) |
1:03.27 |
| 17 | Norbert Rózsa (HUN) |
1:03.30 |
| 18 | Darren Mew (GBR) |
1:03.36 |
| 19 |  Jean-Christophe Sarnin (FRA) |
1:03.37 |
| 20. |  Cho Kwang-Jea (KOR) |
1:03.41 |
 Morgan Knabe (CAN) | ||
| 22 |  Marc Capdevila (ESP) |
1:03.67 |
| 23 |  Yoshinobu Miyazaki (JPN) |
1:03.69 |
| 24 |  Marek Krawczyk (POL) |
1:03.91 |
| 25 | Stéphan Perrot (FRA) |
1:03.92 |
| 26 |  José Couto (POR) |
1:04.11 |
| 27 |  Patrik Isaksson (SWE) |
1:04.12 |
| 28 | Roman Ivanovsky (RUS) |
1:04.21 |
| 29 |  Alwin de Prins (LUX) |
1:04.48 |
| 30 |  Jorge Arias (PER) |
1:05.20 |
| 31 |  Steven Ferguson (NZL) |
1:05.35 |
| 32 |  Francisco Suriano (ESA) |
1:05.38 |
| 33 |  Arsenio López (PUR) |
1:05.45 |