Patent ID: 8368587

Claim:
An in-vehicle radar device which radiates electromagnetic waves and receives reflected waves, from an object, of the electromagnetic waves so as to detect a location of the object and which is mounted on a rear of a vehicle, the in-vehicle radar device comprising: a transmission-and-reception section that transmits the electromagnetic waves and receives the reflected waves; a detection section that detects the location of the object based on the reflected waves; and a cover member that is provided below a rear bumper of the vehicle and that covers the transmission-and-reception section in a manner that a rear surface of the cover member faces a transmission-and-reception surface of the transmission-and-reception section so as to be spaced apart therefrom, wherein the cover member includes at least a cover portion that is formed from a material through which electromagnetic waves are transmitted and that covers the transmission-and-reception surface, and a lower protrusion portion that is provided below the cover portion and formed so as to protrude beyond a surface side of the cover member with respect to the cover portion, the lower portion having a convex shape and the cover portion having a concave shape.