A fuel injection system comprising: two or more intake ports that are communicated with a combustion chamber; two or more intake valves, each of which is placed in an end portion of a corresponding one of the two or more intake ports to open and close a connection between the corresponding intake port and the combustion chamber; two or more fuel injection valves (61, 62), each of which is placed in a corresponding one of the two or more intake ports to inject fuel into intake air that flows in the corresponding intake port; and an injection quantity control means for controlling an injection quantity of fuel at each of the two or more fuel injection valves (61, 62); characterized in that the two or more fuel injection valves (61, 62) include: a first fuel injection valve that has an injection angle of fuel, which is set based on an inner diameter of the corresponding intake port; and a second fuel injection valve that has an injection angle of fuel, which is larger than the injection angle of the first fuel injection valve; the injection quantity control means controls the injection quantities of the first fuel injection valve and of the second fuel injection valve such that an injection quantity of fuel from the first fuel injection valve is larger than an injection quantity of fuel from the second fuel injection valve at time of injecting fuel in a closed state of the two or more intake valves; and the injection quantity control means controls the injection quantities of the first fuel injection valve and of the second fuel injection valve such that the injection quantity of fuel from the second fuel injection valve is larger than the injection quantity of fuel from the first fuel injection valve at time of injecting fuel in an open state of the two or more intake valves. two or more intake ports that are communicated with a combustion chamber; two or more intake valves, each of which is placed in an end portion of a corresponding one of the two or more intake ports to open and close a connection between the corresponding intake port and the combustion chamber; two or more fuel injection valves (61, 62), each of which is placed in a corresponding one of the two or more intake ports to inject fuel into intake air that flows in the corresponding intake port; and an injection quantity control means for controlling an injection quantity of fuel at each of the two or more fuel injection valves (61, 62); characterized in that the two or more fuel injection valves (61, 62) include: a first fuel injection valve that has an injection angle of fuel, which is set based on an inner diameter of the corresponding intake port; and a second fuel injection valve that has an injection angle of fuel, which is larger than the injection angle of the first fuel injection valve; a first fuel injection valve that has an injection angle of fuel, which is set based on an inner diameter of the corresponding intake port; and a second fuel injection valve that has an injection angle of fuel, which is larger than the injection angle of the first fuel injection valve; the injection quantity control means controls the injection quantities of the first fuel injection valve and of the second fuel injection valve such that an injection quantity of fuel from the first fuel injection valve is larger than an injection quantity of fuel from the second fuel injection valve at time of injecting fuel in a closed state of the two or more intake valves; and the injection quantity control means controls the injection quantities of the first fuel injection valve and of the second fuel injection valve such that the injection quantity of fuel from the second fuel injection valve is larger than the injection quantity of fuel from the first fuel injection valve at time of injecting fuel in an open state of the two or more intake valves.