To provide a folded inverted L antenna that can perform impedance matching even when the folded inverted L antenna is disposed close to a conductor while holding a low posture.

A front end of an L-shaped first element 10 comprised of an extension part 10a and a bent part 10b, and a front end of an L-shaped folding element 11 comprised of an extension part 11a and a bent part 11b are connected to each other by a connection element 12. The bent parts 10a and 10b are connected to an upright element 13 disposed vertically on a ground plane 15, thereby constructing a folded inverted L antenna 1. A feeding part 14 is disposed between a lower end of the bent part 10a and the upright element 13. An impedance of an antenna element itself can be adjusted in a wide range according to the width and interval of the first element 10 and the folding element 11, and the position of the feeding part 14.