The First Congress of the National Christian Party (Indonesian: Kongres I Partai Kristen Nasional) was held between 6–8 December 1945.

The meeting also choose the temporary executive committee of the party, with Wilhelmus Zakaria Johannes as the chairman and Maryoto as the secretary.

[1] The congress was opened on 5.00 with a praying ceremony at the Margoyudan Church, led by Ds.

After the opening ceremony, party delegates from different regions of Java begin to attended the congress until 12.00.

The delegates were lodged at the Indonesian Christian Party Hall in Kartisono Street.