A coating included in a surface-coated cutting tool according to the present invention has an α-Al2O3 layer. In a 15-μm square color map of a processed surface in parallel to a surface of the α-Al2O3 layer, an area A1 occupied by coarse crystal grains A is ≦50% and an area A2 in the area A1 occupied by crystal grains having a (001) plane orientation is ≧90%, an area B1 occupied by medium-sized crystal grains B of α-Al2O3 is 20 to 50%, an area B2 in the area B1 occupied by crystal grains having the (001) plane orientation is ≧90%, an area C1 occupied by fine crystal grains C of α-Al2O3 is 10 to 50%, an area C2 in the area C1 occupied by crystal grains having the (001) plane orientation is ≧50%.