This research was conducted to understand the cultural identity in one of the Papuans (Papua -Indonesia) folksongs, i.e. Yamko Rambe Yamko, at one of Choir Festival. The aim of this study was to understand the use of cultural character in the performance of Yamko Rambe Yamko as well as the relationship between the choir performance and the cultural identity of the choir. The method used in this study is a qualitative method with an performance ethnographic approach to that combines musical aspects and non-musical elements. Data collection techniques were carried out through preliminary studies, music analysis, and video analysis. The findings revealed that the local styles in the performance of Yamko Rambe Yamko can be seen in the musical ornaments, choreography, as well as costumes and props from Papuans cultures. The cultural identity in the performance of Yamko Rambe Yamko reflects the traditional dances and the spirit character found in Papuans society. Based on these findings, it can be concluded that in performing Yamko Rambe Yamko at Choir Festival, the choir group not only shows the uniqueness of the cultural character of Papuans as a part of Indonesian cultural diversity, both musically and non-musically, but also becomes a 'cultural ambassador' who emphasizes their national identity.