A disk device includes a loader chassis, a control board, an optical pickup, a flexible flat cable, and a guide member. The loader chassis has a bottom plate with a through hole. The control board is fixedly attached to a lower face of the bottom plate of the loader chassis. The optical pickup is movable between inner and outer positions with respect to the loader chassis in inward and outward movement directions that are parallel to a radial direction of a disk. The flexible flat cable electrically connects the control board to the optical pickup and is partially disposed through the through hole. The flexible flat cable includes a bent end portion that is connected to the optical pickup. The guide member is formed on an upper face of the bottom plate of the loader chassis and guides the bent end portion upward with respect to the bottom plate.