A vehicle , comprising: a floor panel ; and a protection structure of wire harnesses , the protection structure of wire harnesses comprising: an electrical device with a plurality of terminals which are disposed on a side surface thereof and to which the wire harnesses are connected, the electrical device being mounted on the floor panel ; an opening which is formed in the floor panel and, in a planar view of the vehicle , arranged with the terminals in a terminal array direction (L) in which the terminals are arrayed; and a cover which is disposed on the floor panel to cover the electrical device , wherein the wire harnesses extend from below to above the floor panel through the opening and also extend in the terminal array direction (L) above the floor panel , so as to connect with the terminals , the cover has a side wall which faces the side surface of the electrical device and is equipped with a bulging portion , the bulging portion bulging from a wall surface of the side wall so as to be away from the side surface of the electrical device , and at least one of the wire harnesses is laid out in a space defined by the bulging portion within the cover . a floor panel ; and a protection structure of wire harnesses , the protection structure of wire harnesses comprising: an electrical device with a plurality of terminals which are disposed on a side surface thereof and to which the wire harnesses are connected, the electrical device being mounted on the floor panel ; an opening which is formed in the floor panel and, in a planar view of the vehicle , arranged with the terminals in a terminal array direction (L) in which the terminals are arrayed; and a cover which is disposed on the floor panel to cover the electrical device , wherein the wire harnesses extend from below to above the floor panel through the opening and also extend in the terminal array direction (L) above the floor panel , so as to connect with the terminals , the cover has a side wall which faces the side surface of the electrical device and is equipped with a bulging portion , the bulging portion bulging from a wall surface of the side wall so as to be away from the side surface of the electrical device , and at least one of the wire harnesses is laid out in a space defined by the bulging portion within the cover . an electrical device with a plurality of terminals which are disposed on a side surface thereof and to which the wire harnesses are connected, the electrical device being mounted on the floor panel ; an opening which is formed in the floor panel and, in a planar view of the vehicle , arranged with the terminals in a terminal array direction (L) in which the terminals are arrayed; and a cover which is disposed on the floor panel to cover the electrical device , wherein the wire harnesses extend from below to above the floor panel through the opening and also extend in the terminal array direction (L) above the floor panel , so as to connect with the terminals , the cover has a side wall which faces the side surface of the electrical device and is equipped with a bulging portion , the bulging portion bulging from a wall surface of the side wall so as to be away from the side surface of the electrical device , and at least one of the wire harnesses is laid out in a space defined by the bulging portion within the cover . <EOS>