This study divided the entire provisional government era into three periods and identified dress trends in each period. The type, characteristics, and wearing styles of costumes for each period were analyzed and the role of the outfits was reviewed. Unlike the general government, the Korean Provisional Government was a form of government with a unique characteristic. The era of the provisional government can be divided into three periods (the Shanghai period(1919-1932), the Wandering period(1932-1940), and the Chongqing period(1940-1945)), with the overall circumstances and main activities of the government varying between each period. The men were leading figures and staff of the provisional government, most of whom wore western clothing. Notably, the leaders of the March 1 Movement in 1919 wore western suits, helping to spread western styles among the general public. Photos show that members of the provisional government wore different styles of suits that were popular in each period. Some of them wore Chinese clothing such as Jangsam and Magua. Jangsam and Magua were often worn during the Wandering period when Japanese suppression was at its peak. Later, during the Chongqing period, some wore the Zhongshan suit (Mao suit). The women captured in photos were either warriors of the independence movement or family members and staff of the provisional government. They dressed in western costumes, Qipao, Jangsam, or Hanbok. Women wore Hanbok more often than men, and women residing in North America and Russia donned western clothings that were popular at the time. The costumes worn by leading figures and members of the Korean Provisional Government reflected the struggle for independence. They provide clues to the challenges that were facing the country during those periods.