The present invention relates to a static discharger, an aircraft, and an installation process for the static discharger. According to an aspect of the present invention, a static discharger is provided which includes: a basement; and a discharger body installed to the basement. An installation orientation adjusting mechanism is provided between the basement and the discharger body, and the installation orientation adjusting mechanism allows the discharger body to be rotationally orientated, with respect to the basement, to a predetermined installation orientation during an on-site-installation of the static discharger. The static discharger further includes a first fixing mechanism adapted to fix the discharger body, which has been oriented to the predetermined installation orientation, to the basement. According to the present invention, for example, installation adaptation and universality of the static discharger and adjustment and determination of installation orientation of the static discharger can be improved.