Athletics at the 2018 Asian Games – Men's 400 metres hurdles

All times are Western Indonesia Time (UTC+07:00)

Prior to this competition, the existing world, Asian and Games records were as follows.

World Record	Kevin Young (USA)	46.78	Barcelona, Spain	6 August 1992
Asian Record	Abderrahman Samba (QAT)	46.98	Paris, France	30 June 2018
Games Record	Hadi Soua'an Al-Somaily (KSA)	48.42	Busan, South Korea	8 October 2002

Legend

• DNF — Did not finish
• DNS — Did not start

Round 1

• Qualification: First 2 in each heat (Q) and the next 2 fastest (q) advance to the final.

Heat 1

Rank	Athlete	Time	Notes
1	Takatoshi Abe (JPN)	49.71	Q
2	Dmitriy Koblov (KAZ)	50.58	Q
3	Han Se-hyun (KOR)	50.69	q
4	Francis Medina (PHI)	51.68
5	Andrian (INA)	51.93
6	Abdullah Mulahyi (KSA)	52.42
—	Feng Zhiqiang (CHN)	DNS

Heat 2

Rank	Athlete	Time	Notes
1	Chen Chieh (TPE)	50.30	Q
2	Santhosh Kumar Tamilarasan (IND)	50.46	Q
3	Takayuki Kishimoto (JPN)	50.95
4	Mehboob Ali (PAK)	51.27
5	Cai Junqi (CHN)	51.37
6	Halomoan Edwin Binsar (INA)	53.28
7	Phan Khắc Hoàng (VIE)	53.47

Heat 3

Rank	Athlete	Time	Notes
1	Abderrahman Samba (QAT)	49.34	Q
2	Dharun Ayyasamy (IND)	49.55	Q
3	Eric Cray (PHI)	50.54	q
4	Yu Chia-hsuan (TPE)	50.84
5	Reza Malekpour (IRI)	50.99
6	Pipatporn Paungpi (THA)	53.74
7	Chan Ka Chun (HKG)	53.94
—	Quách Công Lịch (VIE)	DNF

Final

Rank	Athlete	Time	Notes
	Abderrahman Samba (QAT)	47.66	GR
	Dharun Ayyasamy (IND)	48.96
	Takatoshi Abe (JPN)	49.12
4	Chen Chieh (TPE)	49.62
5	Santhosh Kumar Tamilarasan (IND)	49.66
6	Dmitriy Koblov (KAZ)	50.60
7	Eric Cray (PHI)	51.53
8	Han Se-hyun (KOR)	51.65

• Results