Background: Sleep disturbances are common among family caregivers (FCs) of patients with advanced cancer. Self-administered acupressure can combat insomnia, but no study has been conducted to evaluate its efficacy in caregivers of patients with advanced cancer. Objective: The aim of this study is to investigate whether self-administered acupressure improves sleep quality for FCs of patients with advanced cancer. Methods: Family caregivers of patients with advanced cancer who reported sleep disturbance (Pittsburgh Sleep Quality Index scores >5 in recent months) were recruited. The experimental group self-administered acupressure at the Baihui (GV20), Fengchi (GB20), Neiguan (PC6), and Shenmen (HT7) points over a 12-week period, whereas the comparison group received sleep hygiene education. Sleep quality was assessed subjectively at 4, 8, and 12 weeks after the intervention using the Pittsburgh Sleep Quality Index and objectively using actigraphy measurements. Improvements in sleep quality were analyzed using a generalized estimating equation. Results: Compared with the control group, the experimental group demonstrated significantly lower sleep latency (Wald χ2 = 11.49, P = .001) and significantly better sleep efficiency (Wald χ2 = 5.24, P = .02) according to actigraphy measurements, but Pittsburgh Sleep Quality Index scores did not differ significantly between the groups. Conclusions: Self-administered acupressure did not demonstrate favorable effects on subjective sleep quality, but did reduce sleep latency and improve sleep efficiency, according to actigraphy measurements. Self-administered acupressure may help relaxation and sedation and promote sleep in FCs. Implications for Practice: Healthcare providers may consider advising FCs to apply this self-administered acupressure to improve their sleep latency and sleep efficiency.