The purpose of this study was to explore the effectiveness of valerian acupressure on sleeping of critically ill patients. The study was a randomized clinical trial. The first day was observation. Experimental groups received valerian acupressure on the second day. Control groups received standard treatment. The measures included observation, Actigraphy, and the Stanford Sleepiness Scale. The result indicated that valerian acupressure patients' sleeping hours were increased and SSS grades were declined. The study supports that valerian acupressure could improve the sleeping time of critically ill patients.