A control device (200) for an internal combustion engine (100) which is provided with an engine body (1), a water injector (61) for injecting water to the inside of an intake passage of the engine body (1), and a fuel injector (41) for injecting fuel to be made to burn inside a combustion chamber (10) of the engine body (1). The control device (200) is provided with a water injection control part controlling the amount of injection of water from the water injector (61) in the combustion cycle where fuel is injected from the fuel injector (41) so that water vaporizing inside the intake passage during the suction stroke and water vaporizing inside the combustion chamber (10) during the compression stroke are generated.