A standing rib roast, also known as prime rib, is a cut of beef from the primal rib, one of the nine primal cuts of beef. While the entire rib section comprises ribs six through 12, a standing rib roast may contain anywhere from two to seven ribs.

A slice of standing rib roast will include portions of the so-called “eye” of the rib, as well as the outer, fat-marbled muscle (spinalis dorsi) known as the “cap.” The traditional preparation for a standing rib roast is to rub the outside of the roast with salt and seasonings and slow-roast with dry heat. It also may be grilled.