A vehicle bonnet structure, having designability, dent resistance and reduced weight, includes an outer panel, an inner panel attached to a back face of this outer panel, and a stiffener disposed between a front portion of the outer panel and a front portion of the inner panel and supported on the inner panel. A first step portion is provided in a vehicle-width-direction inner-side area of the outer panel which extends in the front-rear direction and has a smaller up-down dimension on the front side than on the rear side. The stiffener includes a first sealer which abuts against the outer panel in an extension line vicinity area toward the front side of a boundary portion of the first step portion and suppresses downward displacement of the outer panel, and a first bead portion extending in the front-rear direction at a position in the vicinity of the first sealer.