Inaba Masamori (稲葉 正盛, November 4, 1791 – January 21, 1820) was daimyō of Tateyama Domain during the late-Edo period Japan.
Inaba Masamori was the eldest son of the previous daimyō of Tateyama Domain, Inaba Masatake.
However, while assigned to guard duty at Osaka Castle, he fell ill and died.
Inaba Masatake was married to a daughter of Honda Tadashige, daimyō of Izumi Domain in Mutsu Province.
His grave is at the sub-temple of Rinshō-in within the grounds of Myōshin-ji in Kyoto.