Abstract: A stud detector for detecting studs behind the surface of a wall, the stud detector having a measuring member with first and second ends and a preselected length that corresponds to a conventionally used stud configuration. A sensor is connected to the second end of the measuring member, the sensor including a magnet for detecting the presence of a stud behind a surface of a wall by detecting the presence of a metal object. The measuring member is adapted to permit identification of a surface portion of a wall behind which a stud might be located by measuring a preselected distance from a reference point.