Results for Sri Lanka in 400 metres, Men

Olympic and Intercalated results only.

Games	Athlete/Team	Placement
1948 Summer Olympics	John De Saram	3 h9 r1/4
	Duncan White	DNS
1972 Summer Olympics	Wickramesinghe Wimaladasa	5 h2 r2/4
1996 Summer Olympics	Sugath Thilakaratne	7 h3 r2/4
2000 Summer Olympics	Sugath Thilakaratne	6 h1 r2/4
	Rohan Pradeep Kumara	4 h5 r1/4
2004 Summer Olympics	Rohan Pradeep Kumara	5 h4 r1/3
2024 Summer Olympics	Aruna Singhapurage	DQh2 r3/4