A vehicle, comprising: a floor panel; and a protection structure of wire harnesses (21, 22), the protection structure of wire harnesses (21, 22) comprising: an electrical device with a plurality of terminals (13A, 13B) which are disposed on a side surface thereof and to which the wire harnesses (21, 22) 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 (13A, 13B) in a terminal array direction in which the terminals (13A, 13B) are arrayed; and a cover which is disposed on the floor panel to cover the electrical device, wherein the wire harnesses (21, 22) extend from below to above the floor panel through the opening and also extend in the terminal array direction above the floor panel, so as to connect with the terminals (13A, 13B), 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 (21, 22) is laid out in a space defined by the bulging portion within the cover. a floor panel; and a protection structure of wire harnesses (21, 22), the protection structure of wire harnesses (21, 22) comprising: an electrical device with a plurality of terminals (13A, 13B) which are disposed on a side surface thereof and to which the wire harnesses (21, 22) 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 (13A, 13B) in a terminal array direction in which the terminals (13A, 13B) are arrayed; and a cover which is disposed on the floor panel to cover the electrical device, wherein the wire harnesses (21, 22) extend from below to above the floor panel through the opening and also extend in the terminal array direction above the floor panel, so as to connect with the terminals (13A, 13B), 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 (21, 22) is laid out in a space defined by the bulging portion within the cover. an electrical device with a plurality of terminals (13A, 13B) which are disposed on a side surface thereof and to which the wire harnesses (21, 22) 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 (13A, 13B) in a terminal array direction in which the terminals (13A, 13B) are arrayed; and a cover which is disposed on the floor panel to cover the electrical device, wherein the wire harnesses (21, 22) extend from below to above the floor panel through the opening and also extend in the terminal array direction above the floor panel, so as to connect with the terminals (13A, 13B), 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 (21, 22) is laid out in a space defined by the bulging portion within the cover.