The present invention relates to a method of producing a lithium-ion battery member including an electrode composition layer that includes electrode active material particles and an electrolyte solution on a current collector or a separator, the method including: forming the electrode composition layer on a surface of a support different from either the current collector or the separator; and relocating the electrode composition layer from the surface of the support to the current collector or the separator, wherein a weight percent of the electrolyte solution in the electrode composition layer is 10 wt % or less based on the weight of the electrode composition layer, in the forming the electrode composition layer on a surface of a support and in the relocating the electrode composition layer from the surface of the support to the current collector or the separator.