A suspension board with circuit includes a conductive region in which a conductive layer is formed and a mounting region for mounting a slider on which a magnetic head that is electrically connected to the conductive layer is mounted. The mounting region mounts the slider so that the slider is capable of relatively moving with respect to the conductive region, and the conductive region includes an opposing region that is opposed to the slider in the thickness direction at the time of the relative movement of the slider with respect to the conductive region and a damage preventing portion for preventing damage to the opposing region by the slider.