Matti Kalervo Salminen (born 7 July 1945) is a Finnish operatic bass, now retired, who has sung at the most important opera houses of the world, including the Metropolitan and Bayreuth Festival. He is distinguished by an imposing figure and height (6' 5"), a cavernous, heavy, dark voice with an expansive upper register, and an expressive face. According to one reviewer, in his prime Salminen was "... simply the largest bass voice in captivity. It is not just its roar in powering over Wagner's maximum orchestra, but the way he carves the sonority and forms the color."
Salminen has a special gift for playing menacing, threatening characters. He performed as Fafner and Hagen in the PBS video broadcast Ring Cycle from the Metropolitan Opera, for the largest viewing-audience of the Ring in history.