Taira no Sadamori (平 貞盛)(10th century) was a samurai of the Taira clan who was involved in suppressing the revolt of Taira no Masakado in the 930s-940. He was the son of Taira no Kunika and grandson of Taira no Takamochi, the founder of the Kammu Heishi line. Sadamori was an ancestor of the Hōjō clan which wielded considerable political power several centuries later, during the Kamakura period; his fourth son, Taira no Korehira, was the progenitor of the Ise Taira branch family. Elements of Sadamori's life remain in the folklore volume Konjaku Monogatarishū (Tales of Past and Present).