The boys' 50 metre butterfly event in swimming at the 2014 Summer Youth Olympics took place on 20 and 21 August at the Nanjing Olympic Sports Centre in Nanjing, China.

[1][2][3] The heats were held at 10:09.

[1] The semifinals were held at 18:50.

[2] The final was held at 18:42.

[3]