Optical member holding device, and optical scanning device provided with the same

A device for holding a laser diode (LD) (350) and a collimate lens (360). A laser unit (300) includes an LD supporting section (310,312) supporting the LD, and a lens supporting section (320) supporting the lens positioned opposite to the LD. A connecting portion (314) connects the lens supporting section to the LD supporting section. An adjustment section (313,370) for adjusting a relative position between the LD and the lens is provided in association with the LD supporting section (312). The adjustment section (313,370) allows the LD supporting section to be movable and position-fixable with respect to the lens supporting section (320) as if the LD supporting section (312) serves as a leverage about the connecting portion (314) functioning as a fulcrum.