At the end of the previous season only FK Novi Sad was relegated - in spite of finishing last , FK Vardar was allowed to stay in top flight due to the 1963 Skopje earthquake . Since NK Zagreb and Sutjeska Nikšić were promoted from Yugoslav Second League , the league was contested by 15 teams
1963 Skopje earthquake
1963 Skopje earthquake
1964–65 Yugoslav First League