A side body structure of a vehicle is provided, which includes a hinge pillar extending in vertical directions of the vehicle, a hinge reinforcement disposed in the hinge pillar, and a reinforcing member disposed in the hinge pillar and extending in the vertical directions. The hinge reinforcement is provided with an overlapping section provided on a rear side of a portion of the reinforcing member and overlapping in the vertical directions with the portion when viewed from a vehicle front side.