宫相（拉丁语：Maior domus）是欧洲中世纪早期的一个官职，7世纪至8世纪间法兰克王国都有此官。名义上是掌管宫廷政务以及辅佐君王的亲近官员，但后来演变成王国内实权所在。

墨洛温王朝晚期的君王，许多都被宫相用作傀儡，后来因而被称为“无为王”（法语：rois fainéants）。随后此官职被允许父子传承，更加巩固了其权力，最终传到查理·马特手中，737年国王逝世，查理虽无篡位，却也不立新君，直到741年其子丕平三世便创建了卡洛林王朝。

这个官职后世多指管理贵族豪宅事务的佣人，与其本意（Maior domus实指“管家”）更接近。

Under the Merovingian dynasty, the mayor of the palace (Latin:maior palatii) or majordomo (maior domus) was the manager of the household of the Frankish king. The office existed from the sixth century, and during the seventh it evolved into the "power behind the throne" in the northeastern kingdom of Austrasia. In 751, the mayor of the palace, Pepin the Short, orchestrated the deposition of the king, Childeric III, and was crowned in his place.