A front vehicle body reinforcing structure includes: a pair of front side members extending along a length direction of a vehicle and disposed on left and right sides of the vehicle in a width direction of the vehicle; a dash panel extending in the width direction and a height direction of the vehicle; a front pillar extending in the length direction and the height direction of the vehicle; a fender apron upper member disposed outside each of the pair of front side members in the width direction of the vehicle, extending along the length direction of the vehicle and connected to each of the pair of front side members, the dash panel, and the front pillar; and a first reinforcing member extending along the height direction of the vehicle, of which a first end portion is connected to the fender apron upper member and a second end portion is connected to a lower portion of the vehicle.