The 1938 UCI Road World Championships was the eighteenth edition of the UCI Road World Championships.

[1] It took place in Valkenburg, Netherlands on 2 and 5 September 1938.

[2] Belgian Marcel Kint became the winner in the professional road race.

It was the last edition before World War II and Kint thus remained world champion for eight years.

[3] In the same period, the 1938 UCI Track Cycling World Championships were organized in the Olympic Stadium of Amsterdam, Netherlands.