Miyamoto Iori (宮本 伊織; November 13, 1612 – May 18, 1678) was a samurai during the Edo period of Japan. Iori was an adopted son of legendary ronin Miyamoto Musashi.

Iori was the adopted son of Miyamoto Musashi. He was adopted at the age of 11 by the master swordsman in 1623, when his adoptive father was 39 and living in Edo. The genealogy of Iori's grandson states that Iori was Musashi's nephew from his eldest brother.

Iori was a vassal of Ogasawara Tadazane, a Japanese samurai daimyō of the early Edo period. Iori's rise under Ogasawara's service was exceptionally fast. Iori entered at age 15 as a page and soon after, he became an official vassal. By 1632, Iori received 2500 koku and became one of Ogasawara's principal vassals. By 1638, his salary was increased by 1500 koku because of his efforts during the siege of Shimabara. At only 26, he had become Ogasawara's highest ranked vassal.