The strength and rigidity of a high-strength-vehicle-body-member main part can be effectively improved.A structure of a high-strength vehicle body member, includes: a high-strength-vehicle-body-member main part 37 provided in a front part of a cabin 31 of a vehicle and extending substantially in a vehicle width direction; a high-rigidity structure part 64 provided at least to a middle portion of the high-strength-vehicle-body-member main part 37 and including a plurality of closed cross-section portions aligned in a front-rear direction of the vehicle; a stay 42 attached to the high-rigidity structure part 64 and supporting the high-strength-vehicle-body-member main part 37 in a vertical direction; a post bracket 44 attached to the high-rigidity structure part 64 and supporting the high-strength-vehicle-body-member main part 37 in the vehicle front-rear direction; and a knee protector 47 attached to the high-rigidity structure part 37 and being capable of receiving a knee of an occupant and absorbing a knee input load thereof upon application of an emergency input load in the vehicle front-rear direction.