Matsudaira Tadanao (松平 忠直, 16 July 1595 – 5 October 1650) was a Sengoku to early Edo period Japanese samurai, and the 2nd daimyō of Fukui Domain in Echizen Province.

He took part in the next year's Summer Campaign, taking the head of Sanada Yukimura, and leading his forces at the very tip of the Tokugawa advance into Osaka Castle.

Tadanao was so upset with the perceived insult that in 1621 he feigned illness and did not make his required sankin kōtai trip to Edo; in 1622 he even attempted to poison his wife (who was saved at the last moment by one of her maids taking her place).

For the first three years, he lived at Ogiwara village on the coast, but then moved to an inland location at the insistence of local authorities, who feared that he might attempt to escape.

[2] Tadanao's brother Tadamasa was transferred to Fukui Domain, The clan continued to hold the fief until the end of the Edo period.