There is provided an internal combustion engine ignition apparatus that can effectively raise the ignitability of an inflammable fuel-air mixture, by applying electric power corresponding to the combustion state of an internal combustion engine. A combustion state detection apparatus detects an combustion state inside a combustion chamber of the internal combustion engine; based on the combustion state detected by the combustion state detection apparatus in accordance with an operation state of an ignition coil apparatus, a current supply apparatus supplies an AC current to a spark discharge path formed in the gap of an ignition plug; then, a control apparatus controls the output of the current supply apparatus.