1986 World Junior Championships in Athletics
Track events
100 m	men	women
200 m	men	women
400 m	men	women
800 m	men	women
1500 m	men	women
3000 m		women
5000 m	men
10,000 m	men	women
100 m hurdles		women
110 m hurdles	men
400 m hurdles	men	women
2000 m steeplechase	men
4 × 100 m relay	men	women
4 × 400 m relay	men	women
5000 m walk		women
10,000 m walk	men
Road events
20 km	men
Field events
High jump	men	women
Pole vault	men
Long jump	men	women
Triple jump	men
Shot put	men	women
Discus throw	men	women
Hammer throw	men
Javelin throw	men	women
Combined events
Heptathlon		women
Decathlon	men
v t e

The men's 400 metres hurdles event at the 1986 World Junior Championships in Athletics was held in Athens, Greece, at Olympic Stadium on 16, 17 and 18 July.^[1][2]

Gold	Emilio Valle  Cuba
Silver	Hiroshi Kakimori  Japan
Bronze	Pascal Maran  France

18 July

Rank	Name	Nationality	Time	Notes
	Emilio Valle	Cuba	50.02
	Hiroshi Kakimori	Japan	50.09
	Pascal Maran	France	50.39
4	Carsten Köhrbrück	West Germany	50.58
5	Alain Cuypers	Belgium	50.67
6	Nikolay Boiko	Soviet Union	50.87
7	Dolph Francis	Australia	51.69
	Joseph Maritim	Kenya	DNF

17 July

Rank	Name	Nationality	Time	Notes
1	Hiroshi Kakimori	Japan	50.05	Q
2	Emilio Valle	Cuba	50.39	Q
3	Alain Cuypers	Belgium	50.51	Q
4	Nikolay Boiko	Soviet Union	50.57	Q
5	Stéphane Leger	France	51.90
6	Andrzej Nowak	Poland	52.38
7	Kevin Mason	United States	53.17
	Valeriy Kosobokov	Soviet Union	DNS

Rank	Name	Nationality	Time	Notes
1	Joseph Maritim	Kenya	50.27	Q
2	Dolph Francis	Australia	50.72	Q
3	Pascal Maran	France	50.99	Q
4	Carsten Köhrbrück	West Germany	51.12	Q
5	Róbert Bágyi	Hungary	51.23
6	Philip Hughes	Canada	52.38
7	Michael Graham	United States	53.22
	Herwig Röttl	Austria	DNS

16 July

Rank	Name	Nationality	Time	Notes
1	Joseph Maritim	Kenya	50.70	Q
2	Alain Cuypers	Belgium	51.29	Q
3	Stéphane Leger	France	52.28	Q
4	Constantin Popescu	Romania	52.64
5	Gianni Floridia	Italy	53.02
6	Jorge Guevara	Mexico	54.78
7	Yasser Abdulrahman Fallatah Kadhy	Saudi Arabia	57.30

Rank	Name	Nationality	Time	Notes
1	Pascal Maran	France	51.12	Q
2	Carsten Köhrbrück	West Germany	51.48	Q
3	Róbert Bágyi	Hungary	51.62	Q
4	Dolph Francis	Australia	52.01	q
5	Takahiro Matsuhisa	Japan	52.89
6	Khaled Abdullah Hassan	Bahrain	52.99
7	Daniel Velázquez	Puerto Rico	53.85

Rank	Name	Nationality	Time	Notes
1	Kevin Mason	United States	51.90	Q
2	Nikolay Boiko	Soviet Union	52.20	Q
3	Herwig Röttl	Austria	52.29	Q
4	Antonio Smith	Venezuela	52.42
5	Emil Peshev	Bulgaria	52.48
6	Yehuda Moreli	Israel	53.96
7	Stelios Bisbas	Greece	55.30

Rank	Name	Nationality	Time	Notes
1	Hiroshi Kakimori	Japan	50.61	Q
2	Emilio Valle	Cuba	51.12	Q
3	Philip Hughes	Canada	52.41	Q
4	Pel van de Kerkhof	Netherlands	53.19
5	Mark Langmuir	Australia	53.41
6	Oliver Ciesla	West Germany	55.12
7	Roberto Mobarec	Bolivia	56.15
8	Vasilios Archondidis	Greece	56.38

Rank	Name	Nationality	Time	Notes
1	Andrzej Nowak	Poland	51.93	Q
2	Valeriy Kosobokov	Soviet Union	52.04	Q
3	Michael Graham	United States	52.14	Q
4	Michele Carrozza	Italy	52.60
5	Allan Ince	Barbados	52.63
6	Augustus Lawson	Ghana	54.66
7	Ralph Carter	Canada	54.73
8	Tarek Khamis Dabouss	United Arab Emirates	59.14

According to an unofficial count, 37 athletes from 28 countries participated in the event.