Surface-coated cutting tool

A surface-coated cutting tool comprising:

• a substrate composed of cemented carbide;
• and
• a coating film formed on the substrate,
• the coating film including an intermediate layer in contact with the substrate and an upper layer formed on the intermediate layer,
• the upper layer being made up of a single layer consisting of an upper base layer which is a layer in contact with the intermediate layer or multiple layers constituted of two or more layers including the upper base layer,
• the substrate having a hexagonal crystal system,
• the intermediate layer and the upper base layer having an NaCl crystal structure,
• the intermediate layer having a thickness not smaller than 3 nm and not greater than 10 nm,
• a mismatch in lattice interplanar spacing in an interface region between the substrate and the intermediate layer being not higher than 65% of a theoretical value of a mismatch in lattice interplanar spacing between the substrate and the upper base layer, and
• a mismatch in lattice interplanar spacing in an interface region between the intermediate layer and the upper base layer being not higher than 65% of the theoretical value of the mismatch in lattice interplanar spacing between the substrate and the upper base layer.