A vehicle front body structure includes a side-member front area 11F inclined outwardly in the width direction of a vehicle as directing ahead of the vehicle, a strength control mechanism C provided in the side-member front area 11F, a sub-side member 20 extending from the vicinity of a continuous base of the side-member front area 11F toward the front of the vehicle, substantially straight to an extension of a side-member rear area 11R. The front end of the sub-side member 20 is connected with the rear face of a bumper reinforcement 12. The sub-side member 20 is provided with a deformation-mode control mechanism D that allows the sub-side member 20 to be deformed inwardly in the width direction of the vehicle due to a collision input and interferes with a power unit P, forming an impact load transfer mechanism B.