To perform stratified charge combustion in an engine operation area of a wide range.

This cylinder injection type spark ignition engine is provided with a fuel injection valve 16 for directly injecting fuel into a combustion chamber 15 and a spark plug 16a for igniting the fuel in the combustion chamber. Present required engine output is detected, a theoretical engine speed required in either one of engine operation modes is calculated for obtaining the detected present required engine output, and when this theoretical engine speed is a first limit value to a second limit value in the theoretical engine speed corresponding to engine torque, the engine operation mode is set to two cycles, and a combustion mode is set to the stratified charge combustion.