Disclosed herein is a wideband glass antenna for a vehicle. The wideband glass antenna includes a loop antenna and a pattern. The loop antenna has a loop antenna pattern, in which a first side is connected to a feeding point, a second side is connected to a ground, and the two sides are connected to each other. The loop antenna pattern forms a predetermined space in the loop antenna. The pattern is formed in the loop antenna and is connected by a plurality of tuning arms for expanding a frequency band of the antenna.