An internal combustion engine configured to be operated by a compressed self-ignition, the internal combustion engine comprising: a piston including a cavity; and a fuel injection valve configured to inject a fuel toward a side wall of the cavity formed in the piston; the fuel injection valve including a first injection hole, a second injection hole being paired with the first injection hole, the second injection hole being provided at a position that is offset from a line that passes a central axis of the fuel injection valve and the first injection hole when the fuel injection valve is observed from an axial direction of the fuel injection valve, the second injection hole being provided at a position different from a position provided with the first injection hole in a direction of the central axis of the fuel injection valve, the fuel injection valve being arranged such that a part of fuel injected from the first injection hole and a part of fuel injected from the second injection hole are gathered together at a position in the vicinity of the side wall of the cavity, said position in the vicinity of the side wall of the cavity being spaced from the side wall of the cavity by a predetermined distance, a first needle configured to open and close the first injection hole, and a second needle configured to open and close the second injection hole, the second needle configured to start operating to open the second injection hole after a predetermined time elapses from when the first needle starts operating to open the first injection hole. a piston including a cavity; and a fuel injection valve configured to inject a fuel toward a side wall of the cavity formed in the piston; the fuel injection valve including a first injection hole, a second injection hole being paired with the first injection hole, the second injection hole being provided at a position that is offset from a line that passes a central axis of the fuel injection valve and the first injection hole when the fuel injection valve is observed from an axial direction of the fuel injection valve, the second injection hole being provided at a position different from a position provided with the first injection hole in a direction of the central axis of the fuel injection valve, the fuel injection valve being arranged such that a part of fuel injected from the first injection hole and a part of fuel injected from the second injection hole are gathered together at a position in the vicinity of the side wall of the cavity, said position in the vicinity of the side wall of the cavity being spaced from the side wall of the cavity by a predetermined distance, a first needle configured to open and close the first injection hole, and a second needle configured to open and close the second injection hole, the second needle configured to start operating to open the second injection hole after a predetermined time elapses from when the first needle starts operating to open the first injection hole. a first injection hole, a second injection hole being paired with the first injection hole, the second injection hole being provided at a position that is offset from a line that passes a central axis of the fuel injection valve and the first injection hole when the fuel injection valve is observed from an axial direction of the fuel injection valve, the second injection hole being provided at a position different from a position provided with the first injection hole in a direction of the central axis of the fuel injection valve, the fuel injection valve being arranged such that a part of fuel injected from the first injection hole and a part of fuel injected from the second injection hole are gathered together at a position in the vicinity of the side wall of the cavity, said position in the vicinity of the side wall of the cavity being spaced from the side wall of the cavity by a predetermined distance, a first needle configured to open and close the first injection hole, and a second needle configured to open and close the second injection hole, the second needle configured to start operating to open the second injection hole after a predetermined time elapses from when the first needle starts operating to open the first injection hole.