thumb|Rudi Čajavec
Rudolf Čajavec (1 April 1911 – 2 July 1942) was a Yugoslav pilot (from Zgošća, Bosnia and Herzegovina), best known as the first airman of the Partisan air force..
Rudi Čajavec was born in Zgošća, Kakanj municipality, Bosnia to a family that originally came from Hrvatsko Zagorje. Before the war he studied law at University of Belgrade where he participated in various left-wing groups and was arrested. He also finished school for reserve officers and was a trained pilot. After the Axis invasion of Yugoslavia and establishment of the Independent State of Croatia he came to Banja Luka where he joined the resistance movement. As a reserve lieutenant he was drafted into the Croatian Air Force of the NDH. He landed near Partisan-controlled Prijedor.