Coated cutting tool

A coated cutting tool comprising a substrate and a coating layer formed on the substrate, wherein,

• the coating layer comprises an alternately laminated structure of a first layer and a second layer;
• the first layer contains a compound having a composition represented by a following formula (1):
• (AlaMbTi1-a-b)N (1)
• wherein M represents at least one of a Nb element and a Ta element;
• a is an atomic ratio of an Al element to a total of the Al element, an element represented by M, and a Ti element, and satisfies 0.75≤a≤0.90, and b is an atomic ratio of the element represented by M to the total of the Al element, the element represented by M, and the Ti element, and satisfies 0.00<b≤0.20;
• the second layer contains a compound having a composition represented by a following formula (2), the compound contained in the second layer being different from the compound contained in the first layer:
• (AlcMdTi1-c-d)N (2)
• wherein M represents at least one of a Nb element and a Ta element;
• c is an atomic ratio of an Al element to a total of the Al element, an element represented by M, and a Ti element, and satisfies 0.75≤c≤0.90;
• and d is an atomic ratio of the element represented by M to the total of the Al element, the element represented by M, and the Ti element, and satisfies 0.00≤d≤0.20;
• at least one of a and c is 0.80 or more;
• and
• an average thickness of the alternately laminated structure is 0.5 μm or more and 5.0 μm or less.