Disclosed is a cable-type secondary battery comprising: a core provided with a guide part on the surface thereof as a helical anode or cathode; a sheet-type first inner electrode wound helically around the outer side of the core surface, in between the guide part; a sheet-type first separation layer helically wound around the outer side of the first inner electrode; a sheet-type second inner electrode wound helically around the outer side of the first separation layer; a second separation layer helically wound around the outer side of the second inner electrode; and an outer electrode helically wound around the outer side of the second separation layer.