The object of the present invention is to provide a suspension substrate such that the thickness of an insulating layer for supporting a connecting terminal having a flying structure is uniform. The present invention attains the object by providing a suspension substrate, comprising a metal supporting substrate, an insulating layer formed on the metal supporting substrate, and a wiring layer formed on the insulating layer, wherein a wiring layer projecting section is provided by a plurality; an adjusting section formed on the insulating layer and composed of a first adjusting section and a second adjusting section is provided on both sides of the plural wiring layer projecting sections; and a gap between a first outermost wiring layer projecting section and the first adjusting section, a gap between the adjacent wiring layer projecting sections, and a gap between a second outermost wiring layer projecting section and the second adjusting section are equal.