Penelitian ini bertujuan untuk menganalisis fleksibilitas dan kenyamanan jari kiri dari penerapan teknik finger vibrato pada mahasiswa viola, serta mengetahui alasan teknik finger vibrato yang dapat menjadi alternatif teknik vibrato bagi instrumen viola. Studi kasus dilakukan terhadap mahasiswa aktif ISI Yogyakarta. Fokus penelitian mencakup analisis dari penerapan finger vibrato dari segi kenyamanan dan fleksibilitas jari kiri pemain viola. Penelitian ini menggunakan metode kualitatif dengan pendekatan studi kasus. Hasil penelitian menunjukkan bahwa sebagian besar narasumber belum mengetahui finger vibrato secara spesifik. Melalui proses observasi dan penerapan finger vibrato, sebagian subjek mengalami kesulitan dan kendala pada jari kiri saat menerapkan finger vibrato, hal ini disebabkan karena finger vibrato yang hanya mengandalkan gerakan pada jari kiri tanpa dibantu oleh pergelangan dan lengan kiri. Dari hasil penelitian dapat disimpulkan bahwa teknik finnger vibrato merupakan salah satu jenis vibrato paling sulit dari kelurga string gesek. Temuan ini memberikan kontribusi penting dalam meningkatkan dan menambah pemahaman bagi para pemain viola mengenai finger vibrato.kata kunci : finger vibrato, viola, kenyamanan, fleksibilitas FINGER VIBRATO ON THE VIOLA: AN ANALYSIS OF THE FLEXIBILITY AND COMFORT OF THE LEFT FINGER OF ISI YOGYAKARTA STUDENTSThis study aims to analyze the flexibility and comfort of the left finger from the application of the finger vibrato technique on viola students, as well as to find out the reasons why the finger vibrato technique can be an alternative vibrato technique for viola instruments. The case study was conducted on active students of ISI Yogyakarta. The focus of the study includes an analysis of the application of finger vibrato in terms of comfort and flexibility of the left finger of viola players. This study uses a qualitative method with a case study approach. The results showed that most of the informants did not know finger vibrato specifically. Through the process of observation and application of finger vibrato, some subjects experienced difficulties and obstacles in the left finger when applying finger vibrato, this is because finger vibrato only relies on movements of the left finger without the assistance of the left wrist and arm. From the results of the study, it can be concluded that the finger vibrato technique is one of the most difficult types of vibrato from the string string family. This finding provides an important contribution in improving and adding to the understanding of viola players about finger vibrato. Keywords: finger vibrato, viola, comfort, flexibility