A vehicle body structure, comprising: a dash panel that separates a vehicle front part from a vehicle cabin; a front side member extending along a length of a vehicle body in the vehicle front part, the front side member including an end located rearward of the vehicle body, the end opposite to and secured to the dash panel; a floor frame member forming a floor frame of the vehicle cabin; a reinforcing member having a plate shape, the reinforcing member being disposed further toward a center of the vehicle cabin with respect to the dash panel and the floor frame member and being disposed opposite to the end of the front side member located rearward of the vehicle body, the reinforcing member including an upper portion secured to the dash panel and a lower portion secured to the floor frame member, the reinforcing member having a curvature that is smaller than a curvature of the dash panel, characterized in that the vehicle body structure further comprises a soundproof member of a sheet shape having a predetermined thickness, the soundproof member being disposed further toward the center of the vehicle cabin with respect to the dash panel; and in that the upper portion of the reinforcing member is secured via the soundproof member to the dash panel; the soundproof member is secured, at the upper portion of the reinforcing member, between the dash panel and the reinforcing member; in a region between the upper portion and the lower portion of the reinforcing member, a space is created between the dash panel and the reinforcing member; and the soundproof member is inserted into the space below the reinforcing member, the reinforcing member being disposed opposite to a pedal in the vehicle cabin. a dash panel that separates a vehicle front part from a vehicle cabin; a front side member extending along a length of a vehicle body in the vehicle front part, the front side member including an end located rearward of the vehicle body, the end opposite to and secured to the dash panel; a floor frame member forming a floor frame of the vehicle cabin; a reinforcing member having a plate shape, the reinforcing member being disposed further toward a center of the vehicle cabin with respect to the dash panel and the floor frame member and being disposed opposite to the end of the front side member located rearward of the vehicle body, the reinforcing member including an upper portion secured to the dash panel and a lower portion secured to the floor frame member, the reinforcing member having a curvature that is smaller than a curvature of the dash panel, characterized in that the vehicle body structure further comprises a soundproof member of a sheet shape having a predetermined thickness, the soundproof member being disposed further toward the center of the vehicle cabin with respect to the dash panel; and in that the upper portion of the reinforcing member is secured via the soundproof member to the dash panel; the soundproof member is secured, at the upper portion of the reinforcing member, between the dash panel and the reinforcing member; in a region between the upper portion and the lower portion of the reinforcing member, a space is created between the dash panel and the reinforcing member; and the soundproof member is inserted into the space below the reinforcing member, the reinforcing member being disposed opposite to a pedal in the vehicle cabin.