ABSTRAK Pekerjaan di pabrik sawit berpotensi menimbulkan kejadian nyeri sendi yang dapat mengakibatkan kerugian sehingga pekerjaan harus dilakukan secara hati-hati. Penelitian ini bertujuan untuk mengetahui faktor risiko apa saja yang mempengaruhi kejadian nyeri sendi di PT. X Kabupaten Aceh Singkil. Penelitian ini menggunakan metode kuantitatif analitik dengan desain cross sectional. Besar sampel pada penelitian ini adalah 43 sampel. Variabel dependent pada penelitian ini adalah nyeri sendi dan variabel independent aktivitas fisik, beban kerja, repetisi, waktu istirahat, ergonomi, masa kerja serta perilaku merokok. Analisis pada penelitian ini menggunakan table Distribusi Frequensi, Analisis Bivariat dan Analisis Multivariat. Teknik pengambilan data pada penelitian ini memakai data pimer yang diperoleh dari instrument penelitian berupa kuesioner dan lembar observasi, data sekunder menggunakan instrument berupa jumlah data karyawan. Hasil analisis multivariat menunjukkan bahwa terdapat hubungan yang bermakna antara lingkungan kerja aman dengan kejadian nyeri sendi (0,000; PR 29,000), dan Frequensi merokok (0,032; PR 0,893). Penting bagi perusahaan untuk menerapkan program peregangan, olahraga, rotasi pekerjaan, waktu istirahat yang cukup, memperhatikan ergonomi, relokasi pekerjaan serta memberikan pelatihan postur tubuh ergonomi untuk mencegah cedera. Kata kunci: Arthralgia, Nyeri Sendi, Pekerja Pabrik Sawit, Risiko Kerja. ABSTRACT Work in palm oil factories has the potential to cause joint pain, which can lead to losses; therefore, tasks must be carried out carefully. This study aims to identify the risk factors that influence the incidence of joint pain at PT. X in Aceh Singkil Regency. This research uses a quantitative analytic method with a cross-sectional design. The sample size for this study is 43 respondents. The dependent variable is joint pain, while the independent variables include physical activity, workload, repetition, rest time, ergonomics, length of service, and smoking behavior. Data analysis in this study includes Frequency Distribution Tables, Bivariate Analysis, and Multivariate Analysis. The data collection technique used primary data obtained through research instruments such as questionnaires and observation sheets, while secondary data were gathered using instruments related to employee data. The results of the multivariate analysis show a significant relationship between a safe work environment and the incidence of joint pain (p = 0.000; PR = 29.000), and also with smoking frequency (p = 0.032; PR = 0.893). It is important for the company to implement programs such as stretching, exercise, job rotation, sufficient rest periods, attention to ergonomics, job relocation, and training on ergonomic body posture to prevent injuries Keywords: Arthralgia, Joint Pain, Palm Oil Factory Workers, Occupational Risk.