A glass antenna provided on or in window glass of a vehicle, includes: an antenna conductor including: a first antenna element which is connected to a feed portion and formed into a loop-like shape extending in a first direction; a second antenna element which is formed into an L-like shape by a first partial element which is connected to the first antenna element and extends in the first direction and a second partial element which is connected to the first partial element and extends in a second direction intersecting the first direction at right angles; a third antenna element which is connected to the first antenna element and extends in the second direction on a side where the second partial element extends with respect to the first partial element; and a fourth antenna element which divides the loop of the first antenna element into two loops.