BINDER COMPOSITION FOR ELECTROCHEMICAL DEVICE, SLURRY COMPOSITION FOR ELECTROCHEMICAL DEVICE, FUNCTIONAL LAYER FOR ELECTROCHEMICAL DEVICE, AND ELECTROCHEMICAL DEVICE

A binder composition for an electrochemical device contains a polymer A and water. In the polymer A of the binder composition for an electrochemical device, the content of an amide group-containing monomer unit is not less than 10 mass % and not more than 90 mass %, and the content of an epoxy group-containing monomer unit is not less than 0.1 mass % and not more than 50 mass %.