Carla Beth Green (born 1962) is an American neurobiologist and chronobiologist. She is a professor in the Department of Neuroscience and a Distinguished Scholar in Neuroscience at the University of Texas Southwestern Medical Center. She is the former president of the Society for Research on Biological Rhythms (SRBR), as well as a satellite member of the International Institute for Integrative Sleep Medicine at the University of Tsukuba in Japan.