1. A method of analyzing a linear object, comprising the steps of: dividing a linear object having a cross-sectional shape which is substantially uniform along its length and having a length long enough in comparison with a diameter of the linear object into a plurality of elements with predetermined spacing along the length; determining, when the linear object is deformed, a shape after the deformation; deriving for each of the elements a tangential stiffness equation in a local coordinate system using the element as a basis in the determined shape; translating the derived tangential stiffness equation for each of the elements in the local coordinate system into a tangential stiffness equation for each of the elements in a global coordinate system using the linear object as a basis; deriving a global stiffness equation for the whole of the linear object from the tangential stiffness equation for each of the elements in the global coordinate system which is obtained by the translation; and calculating at least one of the displacement and the load of each of the elements on the basis of the derived global stiffness equation for the whole linear object and the shape after the deformation.