To determine the effect of traditional and disposable bed baths performed in the pediatric intensive care unit (PICU) on the physiologic parameters of children. This research was conducted as a randomized controlled trial with children who were monitored in the PICU. It was found that the pulse and blood pressure immediately after the bath were higher for both bath applications and was the lowest 30 minutes after the bath (p < .05). Children who used traditional baths had a lower body temperature than those who used the disposable bed bath after bathing for the second day. Oxygen saturation averages were found that within the group to be the highest 30 minutes after bathing methods (p < .05). Both bathing methods applied in the PICU had a positive effect on physiologic parameters. It may be recommended to regularly perform the most appropriate bathing for patients with stable hemodynamics in PICUs.