BINDER COMPOSITION FOR ALL-SOLID-STATE SECONDARY BATTERY

Provided is a binder composition for an all-solid-state secondary battery that can yield an all-solid-state secondary battery having excellent output characteristics and high-temperature cycle characteristics. The binder composition for an all-solid-state secondary battery contains a polymer, an anti-aging agent, and an organic solvent. The polymer includes a (meth)acrylic acid ester monomer unit in a proportion of not less than 25 mass % and not more than 95 mass % and has a gel content of 50 mass % or less. The anti-aging agent is contained in an amount of not less than 0.005 parts by mass and not more than 0.5 parts by mass per 100 parts by mass of the polymer.