To obtain a vehicle-mounted antenna capable of improving workability by facilitating the connection of the antenna signals of the signal output and the vehicle harnesses of the antenna amplifier power supply, and simplifying a wiring layout of the harnesses inside the antenna.

The antenna is provided with an antenna case of an on-vehicle antenna 10 which consists of an antenna base 12 and a cover 11 and is fixed on a vehicle body panel 13, a printed circuit board 21 which is incorporated inside the antenna case to constitute an antenna element 17 and an antenna output circuit, and a high-frequency connector 25 which is mounted on this printed circuit board and used for antenna signal output and a circuit driving power source output. This high-frequency connector is made to face an antenna bottom side from an opening hole 26 provided on one part of the antenna base, and this connector can be connected to a vehicle side connector 27 via a connection opening 13b formed on the vehicle body panel.