The men's javelin throw at the 2021 World Athletics U20 Championships was held at the Kasarani Stadium on 18 and 20 August.[1]
The qualification took place on 18 August, in two groups, with Group A starting at 16:13 and Group B starting at 17:09. Athletes attaining a mark of at least 73.00 metres ( Q ) or at least the 12 best performers ( q ) qualified for the final.[2][3]
The final was held on 20 August at 14:19.[4]