<p>Provided is a parabola antenna which can suppress a radio leak by using a simple configuration. The parabola antenna includes: an electric horn for transmitting/receiving a signal; a feed for relaying the signal transmitted/received by the electric horn; a reflector which collects the received signal by reflecting the signal against the electric horn and transmits the signal to be transmitted by reflecting the signal from the electric horn; a reflector support member which supports the reflector; and a feed attaching adapter which attaches the feed to the reflector support member. In order to suppress a leak of a radio wave propagating through a gap of bonding planes, a choke groove is arranged on at least one of the bonding plane between the reflector support member and the reflector and bonding plane between the reflector support member and the feed attaching adapter.</p>
