Results for Thailand in 400 metres, Men

Olympic and Intercalated results only.

Games	Athlete/Team	Placement
1952 Summer Olympics	Sompop Svadanandana	5 h8 r1/4
	Pongummart Ummarttayakul	6 h2 r1/4
1956 Summer Olympics	Somsak Thonf Ar-Ram	5 h4 r1/4
1960 Summer Olympics	Manut Bumrungphuk	6 h7 r1/4
1964 Summer Olympics	Somsak Thongsuk	6 h6 r1/4
1992 Summer Olympics	Aktawat Sakoolchan	5 h1 r1/4