Franjo Šefer (Serbian: Фрањо Шефер [frǎːɲo ʃêfer];[1] German: Francis Schaeffer or Franz Schäffer [frants ˈʃɛfɐ]; born 1905 in Vienna) was a Yugoslav tennis player of Austrian-Jewish descent.

He won seven titles altogether, counting the men's and mixed doubles, and he scored a victory over Franjo Punčec at the international tournament in Bled with 6:4, 6:1.

[2] In addition to the many years he spent at the forefront of the rankings, Šefer supplied the Yugoslav national team its first individual victory in the Davis Cup.

Šefer's fourth Davis Cup appearance came in 1930 against Sweden in Belgrade, where he was the real hero of the match, in which he achieved the first Yugoslavian team victory in this competition.

In 1935 he won the All-India Lawn Tennis Doubles Championships with Kukuljević,[5] after which he returned to his country to actively play until the beginning of World War II.