NOVELTY - Cable-type secondary battery comprises an electrode assembly, which includes a first polarity current collector having a long and thin shape; a second polarity current collector configured to surround at least one of both sides of the electrode assembly which is bent into a substantially S shape; and a cover member configured to surround the second polarity current collector and the electrode assembly.    USE - The cable-type secondary battery is useful as power supply for mobile devices.    ADVANTAGE - The invention provides cable-type secondary battery with an improved structure which can easily change in shape and can obtain excellent stability and performance.    DETAILED DESCRIPTION - Cable-type secondary battery comprises an electrode assembly, which includes a first polarity current collector having a long and thin shape, whose cross-section perpendicular to the longitudinal direction is circular, asymmetrical oval, or polygonal, at least two first polarity electrode active material layers formed on an outer surface of the first polarity current collector to be spaced apart from each other at a predetermined interval in the longitudinal direction, an electrolyte layer filled to surround at least two first polarity electrode active material layers, and at least two second polarity electrode active material layers formed on an outer surface of the electrolyte layer to be spaced apart from each other at a predetermined interval at positions corresponding to the first polarity electrode active material layers, the electrode assembly being continuously bent into a substantially S shape by a space formed by the predetermined interval between the first polarity electrode active material layers; a second polarity current collector configured to surround at least one of both sides of the electrode assembly which is bent into a substantially S shape; and a cover member configured to surround the second polarity current collector and the electrode assembly. An INDEPENDENT CLAIM is a method for manufacturing cable-type secondary battery comprising: (a) preparing a first polarity current collector in the form of a long and thin wire, whose cross-section perpendicular to the longitudinal direction is circular, asymmetrical oval, or polygonal; (b) forming at least two first polarity electrode active material layers on an outer surface of the first polarity current collector to be spaced apart from each other at a predetermined interval in the longitudinal direction; (c) forming an electrolyte layer to surround at least two first polarity electrode active material layers; (d) forming at least two second polarity electrode active material layers on an outer surface of the electrolyte layer to be spaced apart from each other at a predetermined interval at positions corresponding to the first polarity electrode active material layers; (e) forming an electrode assembly by continuously bending the resulting product into a substantially S shape with respect to a space formed by the predetermined interval between the first polarity electrode active material layers; (f) surrounding at least one of both sides of the electrode assembly with a second polarity current collector; and (g) surrounding the second polarity current collector and the electrode assembly with a cover member.