Penelitian ini bertujuan untuk mengetahui nilai-nilai yang terdapat dalam proses adat perkawinan suku Dayak Lundayeh di Desa Lung Barang Kecamatan Mentarang Hulu Kabupaten Malinau. Data dalam penelitian ini berupa data yang diperoleh dari observasi, wawancara, dokumentasi dengan tokoh adat dan masyarakat terkait proses adat perkawinan suku Dayak Lundayeh yang memiliki makna dan nilai pada setiap proses dilaksanakan. Penelitian ini menggunakan pendekatan kualitatif dengan analisis data deskriptif teori Sugiono yaitu pengumpulan data, reduksi data, penyajian data, penarikan kesimpulan. Berdasarkan hasil penelitian, proses adat perkawinan suku Dayak Lundayeh menekankan pada nilai material, nilai sosial, nilai religius (agama), nilai kebudayaan. Dalam proses adat perkawinan Dayak Lundayeh ditemukan 21 data. 6 data dalam nilai material, 7 data dalam nilai sosial, 1 data dalam nilai religius (agama) dan, 7 data dalam nilai kebudayaan. Proses adat perkawinan suku Dayak Lundayeh yang mencerminkan identitas dalam adat perkawinan suku Dayak Lundayeh yang telah diwariskan secara turun-temurun dan terus dilaksanakan sampai saat ini.
Kata Kunci: Dayak Lundayeh, nilai adat perkawinan, folklor sebagian lisan.

The purpose of this study was to ascertain the values that were present in the Dayak Lundayeh tribe's traditional marriage ceremony in Lung Barang Village, Mentarang Hulu District, Malinau Regency. The data collected in this study was gathered through observations, interviews, and documentation with community members and traditional leaders regarding the Dayak Lundayeh tribe's traditional marriage ceremony, which had significance and worth in every step. This study employed a qualitative methodology with descriptive data analysis from Sugiono's theory which included data collection, reduction, presentation, and conclusion-making. According to the study's findings, the Dayak Lundayeh tribe's traditional marriage ceremony placed a strong emphasis on material, social, religious, and cultural elements. Twenty one data were discovered in the Dayak Lundayeh tribe's traditional marriage ceremony. Six of the facts pertained to material values, seven to social values, one to religious values, and seven to cultural values. The identity of the Dayak Lundayeh tribe is reflected in their customary marriage rite, which has been performed up to this point and has been passed down from generation to generation. Keywords: Dayak Lundayeh, Customary Values of Marriage, Partial Oral Folklore