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Recent publications have questioned the efficacy of massage. It is acknowledged that critical care environment are stressful for patients in term of invasive medical, and nursing procedures. Continuous brighting and excessive noise prohibits the potential relaxation and sleep. In this article, which is a research study, the physiologic response during and following a five minutes administration of back massage are described. This study is a semi-experimental research in which a 5 minutes back massage was offered to 25 patients as stress reduction intervention. Physiological data (Heart rate, mean arterial blood pressure, respiration and peripheral oxygen saturation) were obtained from the patient bedside monitoring system. Results indicated there was significant effect from the intervention on peripheral oxygen saturation (P<0.002). However, a significant decrease in heart rate (P<0.001), blood pressure (P<0.001) and respiration rate (P<0.001) was observed during the back massage intervention. Results indicated back massage had the potential effect of increasing relaxation as evidenced by physiological change during the intervention administration to critically ill patient in intensive care unit massage was found to be a useful therapy to enhance relaxation and sleep in critically ill patient.