Abstract: Bed Occupancy Rate (BOR) is a number that indicates the percentage of the level of use of the bed at a certain time unit in inpatient units. The high achievement of BOR shows that there is an increase in service usage. This condition also shows that the work activities of health workers in the room have also increased. Increased work activities can be the cause of nurses work fatigue. Fatigue caused by several factors, among others shifts work, individual factors (health or illness, gender, age, education, workload, tenure, marital status and nutritional status). The research aims to analiyze factors influencing working fatigue in nurses at the inpatient unit Idaman Regional Hospital Banjarbaru.