The pharmacokinetics of doravirine (DOR) have not been clarified in patients undergoing hemodialysis (HD). In this study, we evaluated the pharmacokinetics of DOR in four HIV-1-infected patients undergoing HD who were administered DOR. The participants were patients undergoing HD for end-stage renal disease and were administered DOR. DOR was administered once daily (one tablet of 100 mg), every evening. On days of HD treatment, DOR was administered after the end of the procedure. After administration of DOR for at least 1 week, the plasma DOR concentration was measured. The median plasma trough DOR concentration was 766.9 ng/mL (range: 509-1085 ng/mL). The median DOR clearance by HD, DOR elimination rate, half-life (T1/2) of plasma DOR concentration during HD, and T1/2 during the non-HD period were 85.04 mL/min, 73.12%, 7.71 h, and 13.76 h, respectively. The T1/2 during the HD period was significantly shorter than the T1/2 during the non-HD period (p = 0.0030). In this study, elimination of DOR by HD was confirmed. Viral suppression was maintained in all patients undergoing HD, and none had adverse events or safety problems. As DOR is eliminated by HD, monitoring its plasma concentration is considered necessary for clinical use.