A front vehicle body reinforcing structure may include front side members and front fender apron members. The front side members are formed to be extended in a length direction of a vehicle, are disposed at both left and right sides in a width direction of the vehicle, respectively, and each includes a front tip portion that is positioned at a front side in the length direction of the vehicle. Each of the front fender apron members is provided with a front tip portion that is formed to match the front tip portion of a respective front side member in the length direction of the vehicle to be coupled to the front tip portion of the respective front side member, and formed to be extended in the length direction of the vehicle. The structure effectively reduces impact of a frontal collision accident by increasing structural rigidity of the front vehicle body.