Four Soft Gamma Repeaters (SGRs) have now been identified with certainty, and a fifth has possibly been detected. I will review their X-ray and gamma-ray properties in both outburst and quiescence. The magnetar model accounts fairly well for the observations ofSGR1806−20andSGR1900+14,but data are still lacking forSGR1627−41andSGR0525−66.The locations of the SGRs with respect to their supernova remnants suggest that they are high-velocity objects. ©2000 American Institute of Physics.