A roof antenna for a vehicle is provided having an antenna unit that receives radio waves, an antenna cover that covers the antenna unit, and an annular pad interposed between the antenna cover and the roof, wherein the pad has an antenna cover reception unit formed from an elastic structure formed at a portion, of the pad, opposing a lower end of the antenna cover, and that is pressed by the lower end of the antenna cover to elastically deform in a pressed direction, and a lip unit formed on an outer circumferential end of the antenna cover reception unit, that covers an outer circumference of the lower end of the antenna cover, and that is in contact with the roof.