A coated cutting tool includes a coating layer formed on a substrate. The coating layer includes an alternating laminate structure of two or more compound layers of each of two or more different compositions. One layer contains a compound having a composition (AlxM1-x)N, where atomic ratio x is 0.58 to 0.90; and another layer contains a compound having a composition (AlyM1-y)N, where atomic ratio y is 0.57 to 0.79. M is an element of at least one kind selected from Groups 4, 5, and 6 elements and Si. An absolute value of a difference between amounts of a specific metal element in the compound layers relative to amounts of the metal element respectively contained therein is between 0 and 5 atom %. An average thickness of each compound layer is from 1 to 50 nm. An average thickness of the alternating laminate structure is from 1.5 to 15 μm.