An internal combustion engine, comprising: an injector which injects fuel into an intake passage formed in a cylinder head during an intake stroke and during an exhaust stroke; an intake opening which communicates the intake passage an inside of a cylinder; an intake stroke injection means which causes the injector to inject fuel during the intake stroke while an intake valve is opening; an exhaust stroke injection means which causes the injector to inject fuel during the exhaust stroke before an intake valve is opening; and an injection control means which controls the intake stroke injection means to inject fuel from the injector during the intake stroke and introduce fuel into the cylinder from the intake opening, thereby forming a stratified air-fuel mixture within the cylinder, in a state where a temperature of an exhaust purifying catalyst is lower than or equal to a predetermined temperature, wherein the injection control means operates the intake stroke injection means such that a center of a fuel injection period from an injection start timing until an injection end timing, the fuel injection period is performed in a period where the fuel is injected from the injector, is located before a displacement speed of the intake valve in a closing direction occurs, characterized in that the injector is attached to an intake manifold connected to the intake passage such that the fuel injected by the operation of the intake stroke injection means passes between an outer periphery of an umbrella portion of the intake valve and an edge of the intake opening so as to be directly introduced into the cylinder in a period until a lift of the intake valve becomes the maximum after the lift is started, and a fuel-rich portion of the stratified air-fuel mixture is guided around an ignition plug in order to retard the ignition timing; and the injection start timing satisfies the following expression: θ ⁢ SOI > Max θ IO, θ ITDC − θ ⁢ dly and the injection end timing satisfies the following expression: θ ⁢ EOI < Min θ ACC0, θ IBDC − θ ⁢ dly where θSOI denotes the injection start timing, θIO denotes an opening timing of the intake valve, θITDC denotes an intake top dead center, θdly denotes a delay time, θEOI denotes the injection end timing, θACC0 denotes a time at which the displacement speed of the intake valve is changed to a negative value from zero or more, and θIBDC denotes an intake bottom dead center. an injector which injects fuel into an intake passage formed in a cylinder head during an intake stroke and during an exhaust stroke; an intake opening which communicates the intake passage an inside of a cylinder; an intake stroke injection means which causes the injector to inject fuel during the intake stroke while an intake valve is opening; an exhaust stroke injection means which causes the injector to inject fuel during the exhaust stroke before an intake valve is opening; and an injection control means which controls the intake stroke injection means to inject fuel from the injector during the intake stroke and introduce fuel into the cylinder from the intake opening, thereby forming a stratified air-fuel mixture within the cylinder, in a state where a temperature of an exhaust purifying catalyst is lower than or equal to a predetermined temperature, wherein the injection control means operates the intake stroke injection means such that a center of a fuel injection period from an injection start timing until an injection end timing, the fuel injection period is performed in a period where the fuel is injected from the injector, is located before a displacement speed of the intake valve in a closing direction occurs, characterized in that the injector is attached to an intake manifold connected to the intake passage such that the fuel injected by the operation of the intake stroke injection means passes between an outer periphery of an umbrella portion of the intake valve and an edge of the intake opening so as to be directly introduced into the cylinder in a period until a lift of the intake valve becomes the maximum after the lift is started, and a fuel-rich portion of the stratified air-fuel mixture is guided around an ignition plug in order to retard the ignition timing; and the injection start timing satisfies the following expression: θ ⁢ SOI > Max θ IO, θ ITDC − θ ⁢ dly and the injection end timing satisfies the following expression: θ ⁢ EOI < Min θ ACC0, θ IBDC − θ ⁢ dly where θSOI denotes the injection start timing, θIO denotes an opening timing of the intake valve, θITDC denotes an intake top dead center, θdly denotes a delay time, θEOI denotes the injection end timing, θACC0 denotes a time at which the displacement speed of the intake valve is changed to a negative value from zero or more, and θIBDC denotes an intake bottom dead center.