A vehicle comprising: a hood provided above a power unit compartment of the vehicle; a windshield glass disposed at a hood rear end portion of the hood; and a pedestrian protection airbag device (10; 60; 70) comprising: an airbag case that is configured to be disposed with a length direction of the airbag case along a vehicle width direction, a vehicle width direction middle region of the airbag case being formed with a cross-sectional height in a vehicle up-and-down direction in a cross section cut up and down along the vehicle front-and-rear direction, the cross-sectional height of the vehicle width direction middle region being smaller than a cross-sectional height in the vehicle up-and-down direction of a general portion of the airbag case, the general portion being at a vehicle width direction outer side relative to the middle region; a pair of inflators that are respectively accommodated at each of two vehicle width direction ends of the middle region of the airbag case; and an airbag that is folded and accommodated in the airbag case, the airbag inflating and expanding, due to pressure of gas generated by the inflators, to the vehicle rearward side through a gap between the hood rear end portion and the windshield glass; characterized in that the airbag case is disposed outside the power unit compartment and at the vehicle upper side relative to a cowl louver, with a gap formed therebetween, and a front end portion of the cowl louver extends to the vehicle forward side relative to the airbag case and is pressed against a bulge portion of the hood with weatherstripping interposed therebetween, and wherein the power unit compartment and the airbag case are partitioned from one another by the cowl louver. a hood provided above a power unit compartment of the vehicle; a windshield glass disposed at a hood rear end portion of the hood; and a pedestrian protection airbag device (10; 60; 70) comprising: an airbag case that is configured to be disposed with a length direction of the airbag case along a vehicle width direction, a vehicle width direction middle region of the airbag case being formed with a cross-sectional height in a vehicle up-and-down direction in a cross section cut up and down along the vehicle front-and-rear direction, the cross-sectional height of the vehicle width direction middle region being smaller than a cross-sectional height in the vehicle up-and-down direction of a general portion of the airbag case, the general portion being at a vehicle width direction outer side relative to the middle region; a pair of inflators that are respectively accommodated at each of two vehicle width direction ends of the middle region of the airbag case; and an airbag that is folded and accommodated in the airbag case, the airbag inflating and expanding, due to pressure of gas generated by the inflators, to the vehicle rearward side through a gap between the hood rear end portion and the windshield glass; an airbag case that is configured to be disposed with a length direction of the airbag case along a vehicle width direction, a vehicle width direction middle region of the airbag case being formed with a cross-sectional height in a vehicle up-and-down direction in a cross section cut up and down along the vehicle front-and-rear direction, the cross-sectional height of the vehicle width direction middle region being smaller than a cross-sectional height in the vehicle up-and-down direction of a general portion of the airbag case, the general portion being at a vehicle width direction outer side relative to the middle region; a pair of inflators that are respectively accommodated at each of two vehicle width direction ends of the middle region of the airbag case; and an airbag that is folded and accommodated in the airbag case, the airbag inflating and expanding, due to pressure of gas generated by the inflators, to the vehicle rearward side through a gap between the hood rear end portion and the windshield glass; characterized in that the airbag case is disposed outside the power unit compartment and at the vehicle upper side relative to a cowl louver, with a gap formed therebetween, and a front end portion of the cowl louver extends to the vehicle forward side relative to the airbag case and is pressed against a bulge portion of the hood with weatherstripping interposed therebetween, and wherein the power unit compartment and the airbag case are partitioned from one another by the cowl louver.