A motorcycle comprising: a headlight including a part of material that shields an electromagnetic wave; a taillight including a part of material that shields the electromagnetic wave; and a rear radar device that transmits a transmission wave, which is the electromagnetic wave for detecting the surroundings, rearward from a transmission/reception portion, and receives a reflected wave that is reflected by an object at the transmission/reception portion, wherein the transmission/reception portion of the rear radar device is covered by a member with the material that transmits the electromagnetic wave, at least in a range where the transmission wave is transmitted, the rear radar device for transmitting the transmission wave rearward is arranged, and in a rear view, the radar device is arranged outside a rear projection area of the taillight, the rear radar device is arranged inside a rear frame cover, the rear frame cover is made of the material that transmits the electromagnetic wave, the motorcycle includes a rear frame, the position of the rear radar device in the vertical direction overlaps the rear frame, the rear radar device is arranged rearward of the rear frame, in the rear view, the transmission/reception portion of the rear radar device is arranged below the taillight, the rear radar device in the vertical direction is positioned below the taillight, and its position overlaps the rear frame, the transmission/reception portion of the rear radar device is arranged forward of the taillight, a rear flap that is arranged below the taillight is provided, the rear radar device is positioned above the rear fender and the rear flap, and wherein the transmission/reception portion of the rear radar device is arranged between the taillight and the rear flap, wherein the rear frame cover covers the outside of the rear radar device in the left-right direction, and the rear frame cover covers the rear side of the rear radar device, wherein the rear frame cover covers all of the transmission ranges of the transmission wave of the rear radar device, wherein the transmission wave that is transmitted by the rear radar device has the range in the vertical direction, wherein the transmission wave does not interfere with the rear flap or when the transmission wave interferes with the rear flap, the rear flap is made of the material that transmits the electromagnetic wave, and therefore a detection range of the objects is not reduced. a headlight including a part of material that shields an electromagnetic wave; a taillight including a part of material that shields the electromagnetic wave; and a rear radar device that transmits a transmission wave, which is the electromagnetic wave for detecting the surroundings, rearward from a transmission/reception portion, and receives a reflected wave that is reflected by an object at the transmission/reception portion, wherein the transmission/reception portion of the rear radar device is covered by a member with the material that transmits the electromagnetic wave, at least in a range where the transmission wave is transmitted, the rear radar device for transmitting the transmission wave rearward is arranged, and in a rear view, the radar device is arranged outside a rear projection area of the taillight, the rear radar device is arranged inside a rear frame cover, the rear frame cover is made of the material that transmits the electromagnetic wave, the motorcycle includes a rear frame, the position of the rear radar device in the vertical direction overlaps the rear frame, the rear radar device is arranged rearward of the rear frame, the rear radar device is arranged inside a rear frame cover, the rear frame cover is made of the material that transmits the electromagnetic wave, the motorcycle includes a rear frame, the position of the rear radar device in the vertical direction overlaps the rear frame, the rear radar device is arranged rearward of the rear frame, in the rear view, the transmission/reception portion of the rear radar device is arranged below the taillight, the rear radar device in the vertical direction is positioned below the taillight, and its position overlaps the rear frame, the transmission/reception portion of the rear radar device is arranged forward of the taillight, a rear flap that is arranged below the taillight is provided, the rear radar device is positioned above the rear fender and the rear flap, and wherein the transmission/reception portion of the rear radar device is arranged between the taillight and the rear flap, wherein the rear frame cover covers the outside of the rear radar device in the left-right direction, and the rear frame cover covers the rear side of the rear radar device, wherein the rear frame cover covers all of the transmission ranges of the transmission wave of the rear radar device, wherein the transmission wave that is transmitted by the rear radar device has the range in the vertical direction, wherein the transmission wave does not interfere with the rear flap or when the transmission wave interferes with the rear flap, the rear flap is made of the material that transmits the electromagnetic wave, and therefore a detection range of the objects is not reduced.