Even though there have been many advances in the pharmacological treatment of insomnia, many patients with insomnia visit complementary and alternative medicine (CAM) specialists for help due to fear of the side effects of long-term treatment with hypnotics. Acupuncture is commonly used to treat insomnia in the field of CAM. Among the different methods of acupuncture, it has been noted that ear acupressure (placing magnetic pellets on the auricular points), which has the advantage of being non-invasive and easily carried out, shows possible effects whereby there is improvement in the sleep quality of old adults. However, it is lacking of the evidence of the randomized controlled trial (RCT) of ear acupressure on insomnia.