NOVELTY - Solid state electrolyte layer (10) comprises: a sulfide solid state electrolyte material (1) that is manufactured from a raw material composition containing lithium sulfide and phosphorus pentasulfide and is substantially free of a bridging sulfur; and a hydrophobic polymer (2) for binding the sulfide solid state electrolyte material.    USE - The solid state electrolyte layer is useful in all-solid state lithium battery (claimed).    ADVANTAGE - The composition provides an electrode active material layer with increased resistance due to the deterioration of sulfide solid state electrolyte material suppression.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (1) an electrode active material layer comprising: an electrode active material; the sulfide solid state electrolyte material; and the hydrophobic polymer for binding the electrode active material and the sulfide solid state electrolyte material;    (2) an all solid state lithium battery comprising: a positive electrode active material layer; a negative electrode active material layer; and the solid state electrolyte layer, which is formed between the positive electrode active material layer and the negative electrode active material layer, where at least one of the positive electrode active material layer and the negative electrode active material layer is the electrode active material layer;    (3) manufacturing a solid state electrolyte layer, comprising: mixing the sulfide solid state electrolyte material with the hydrophobic polymer in a solvent to prepare solid state electrolyte layer forming slurry; and coating a substrate with the solid state electrolyte layer forming slurry to form a solid state electrolyte layer forming coated film; and    (4) manufacturing an electrode active material layer, comprising: mixing together an electrode active material, the sulfide solid state electrolyte material and the hydrophobic polymer in a solvent to form an electrode active material layer forming slurry; and coating a substrate with the electrode active material layer to form an electrode active material layer forming coated film.    DESCRIPTION OF DRAWING(S) - The figure shows a sectional view of solid state electrolyte layer.    Sulfide solid state electrolyte material (1)    Hydrophobic polymer (2)    Solid state electrolyte layer (10)