A coating method comprising: a slurry deposition step of depositing a slurry including a coarsely particulate ceramic and a finely particulate ceramic on a base material of an oxide-based ceramics matrix composite such that a proportion of coarse particles decreases towards a surface of the base material; a bond coating formation step of forming a bond coating by performing a heat treatment on the base material on which the slurry has been deposited; and a top coating formation step of forming a top coating by thermally spraying a ceramic onto the bond coating, wherein the slurry deposition step includes: (i) a first slurry deposition step of depositing a first slurry in which the coarsely particulate ceramic and the finely particulate ceramic are mixed at a first proportion which has been preset, on the base material, and (ii) a second slurry deposition step of depositing a second slurry in which the coarsely particulate ceramic and the finely particulate ceramic are mixed at a second proportion having a proportion of coarse particles which is lower than that in the first proportion, on a surface of the first slurry, wherein the first proportion is a proportion of coarse particles in a range of 60% to 80% by volume, wherein the second proportion is a proportion of coarse particles in a range of 40% to 60% by volume, wherein the oxide-based ceramics matrix composite is an alumina silica type oxide-based ceramics matrix composite, and wherein the coarsely particulate ceramic and the finely particulate ceramic are alumina-based powder having a thermal expansion coefficient positioned at an intermediate position between thermal expansion coefficients of the base material and the top coating. a slurry deposition step of depositing a slurry including a coarsely particulate ceramic and a finely particulate ceramic on a base material of an oxide-based ceramics matrix composite such that a proportion of coarse particles decreases towards a surface of the base material; a bond coating formation step of forming a bond coating by performing a heat treatment on the base material on which the slurry has been deposited; and a top coating formation step of forming a top coating by thermally spraying a ceramic onto the bond coating, wherein the slurry deposition step includes: (i) a first slurry deposition step of depositing a first slurry in which the coarsely particulate ceramic and the finely particulate ceramic are mixed at a first proportion which has been preset, on the base material, and (ii) a second slurry deposition step of depositing a second slurry in which the coarsely particulate ceramic and the finely particulate ceramic are mixed at a second proportion having a proportion of coarse particles which is lower than that in the first proportion, on a surface of the first slurry, (i) a first slurry deposition step of depositing a first slurry in which the coarsely particulate ceramic and the finely particulate ceramic are mixed at a first proportion which has been preset, on the base material, and (ii) a second slurry deposition step of depositing a second slurry in which the coarsely particulate ceramic and the finely particulate ceramic are mixed at a second proportion having a proportion of coarse particles which is lower than that in the first proportion, on a surface of the first slurry, wherein the first proportion is a proportion of coarse particles in a range of 60% to 80% by volume, wherein the second proportion is a proportion of coarse particles in a range of 40% to 60% by volume, wherein the oxide-based ceramics matrix composite is an alumina silica type oxide-based ceramics matrix composite, and wherein the coarsely particulate ceramic and the finely particulate ceramic are alumina-based powder having a thermal expansion coefficient positioned at an intermediate position between thermal expansion coefficients of the base material and the top coating.