A pickup device employing an inexpensive flexible printed circuit sheet (FPC)
which
demonstrates preferable electrical characteristics. FPC has a signal conductive
layer inside, and a U-shape bending portion is formed in a midway of FPC at a position
where a hologram unit is connected. An opening is formed on FPC adjacent to an
area when the hologram unit is connected, and the length of this opening is longer
than the height of the hologram unit.