PURPOSE: To reduce securely noxious formations and unburnt fuel components by constituting a ceramics coated layer of a metal wall surface of an engine combustion chamber from a plurality of layers having Ni-Al layer, ZrO2 layer and ZrO2-CeO2.

CONSTITUTION: On a wall surface of a combustion chamber constituted from a piston 12, a cylinder head 13, swirl chamber 14, etc. is formed a coating layer 18 of ceramics material having adiabatic property. This coating layer 18 is constituted from a plurality of layers having Ni-Al layer 18A having mixed powder of Ni and Al welded, injected and coated on the wall surface of the piston 12, ZrO2-layer 18B having ZrO2 powder welded, injected coated on the upper layer side of said Ni-Al layer and further ZrO2-CeO2 layer 18C having mixed powder of ZrO2 and CeO2 welded, injected and coated on the upper side of Zr2 layer. Thus, the adiabatic property of ceramics coated layer can be ensured to reduce securely noxious formations and unburnt fuel components.