To prevent fuel density at the time of ignition combustion around an ignition plug from being excessively thick, in a cylinder injection device.

A solenoid valve (pressure reduction means) 20 is interposed in a fuel supply pipe 10a extending from a common rail 5 to a fuel injection nozzle 11. This solenoid valve 20 has two positions of an open position 20a and a restriction position 20b. Normally, the solenoid valve 20 is located at the open position 20a and is switched to the restriction position 20b for every end of an injection period at the time of a comparatively high load in a stratified combustion mode.