Hot wires and planar heating sheet comprising same

The present invention relates to a planar heating sheet comprising a linear heating material comprising: a single fibrous body; and a plurality of hot wires surrounding the single fibrous body, wherein each of the hot wires comprises: a metal nanowire; an organic compound layer coated on the metal nanowire; and a metal dioxide layer coated on the organic compound layer. The present invention has the linear heating material formed by coating, on the single fibrous body, the hot wires, each of which comprising the nanowire, the organic compound layer coated on the metal nanowire, and the metal oxide layer coated on the organic compound layer, and fulfills a planar heating sheet via a plurality of such linear heating materials. Consequently, the present invention can be naturally folded or bent, like an ordinary fabric, for use.