A two-cycle engine comprising: an exhaust port which is opened and closed at one end portion in a longitudinal direction of a cylinder; a scavenging port which is opened and closed at the other end portion in the longitudinal direction of the cylinder; and a fuel injection port which injects a fuel into the cylinder, characterized in that the fuel injection port is provided at an intermediate portion between said one end portion corresponding to the exhaust port and said other end portion corresponding to the scavenging port, said intermediate portion corresponding to the central belly portion of the cylinder, wherein the fuel begins to be injected in a state in which at least any one of the exhaust port and the scavenging port is opened; the two-cycle engine further comprising a fuel injection control unit which is configured to control the fuel injection port to be in an open state before an exhaust gas in the cylinder is completely exhausted from the exhaust port and after an intake fresh air layer suctioned from the scavenging port into the cylinder reaches a fuel injection position of the fuel injection port, and wherein the fuel injection control unit ascertains an opening degree of the exhaust port and an opening degree of the scavenging port based on a crank angle signal and an exhaust valve opening and closing timing signal, outputs a fuel injection valve operating signal to a fuel injection valve which opens and closes the fuel injection port and thereby allows the injection and injection stop of the fuel gas to be performed, and performs opening and closing control of the fuel injection port. an exhaust port which is opened and closed at one end portion in a longitudinal direction of a cylinder; a scavenging port which is opened and closed at the other end portion in the longitudinal direction of the cylinder; and a fuel injection port which injects a fuel into the cylinder, characterized in that the fuel injection port is provided at an intermediate portion between said one end portion corresponding to the exhaust port and said other end portion corresponding to the scavenging port, said intermediate portion corresponding to the central belly portion of the cylinder, wherein the fuel begins to be injected in a state in which at least any one of the exhaust port and the scavenging port is opened; the two-cycle engine further comprising a fuel injection control unit which is configured to control the fuel injection port to be in an open state before an exhaust gas in the cylinder is completely exhausted from the exhaust port and after an intake fresh air layer suctioned from the scavenging port into the cylinder reaches a fuel injection position of the fuel injection port, and wherein the fuel injection control unit ascertains an opening degree of the exhaust port and an opening degree of the scavenging port based on a crank angle signal and an exhaust valve opening and closing timing signal, outputs a fuel injection valve operating signal to a fuel injection valve which opens and closes the fuel injection port and thereby allows the injection and injection stop of the fuel gas to be performed, and performs opening and closing control of the fuel injection port.