The First Congress of the National Christian Party (Indonesian: Kongres I Partai Kristen Nasional) was held between 6–8 December 1945. The congress was the first congress of the party, held in one month after the formation on November 10, 1945. The congress was only attended by the party delegates from Java. The congress decided to change the name of the party from National Christian Party to Indonesian Christian Party. A permanent central executive committee of the party was formed.