A flywheel device including a support body, a rotation shaft, a pair of disk members spaced apart from each other, a pair of inner cylindrical members that are connected to outer circumferences of the disk members, respectively, and a pair of outer cylindrical members that are arranged to the support body. The inner cylindrical members are formed by continuous inner magnets in a circumference direction, having magnetic poles on outer peripheral surfaces thereof. The outer cylindrical members has outer magnets that face the inner magnets with the same polarity facing each other. The rotation shaft is rotatably supported with respect to the support body in a non-contact manner due to repulsive force between the inner magnets and the outer magnets, and centers of widths of the inner magnets in an axis direction are offset from centers of widths of the outer magnets in the axis direction.

A hybrid airfoil bearing for a shaft is provided and includes airfoil bearing components and passive magnetic bearing components. The airfoil bearing components include a top foil immediately surrounding the shaft and additional components. The passive magnetic bearing components are integrated into the shaft and the additional components of the airfoil bearing components to remove a static load of the shaft on the top foil.