To provide a composite particle for an electrochemical device electrode which makes it possible to provide an electrochemical device electrode having a high adhesion with a current collector, excellent formability, low internal resistance, and excellent high-temperature and low-temperature cycle characteristics.

Provided is a composite particle for an electrochemical device electrode which comprises an electrode active material, and a binder. The binder comprises fluorine-based polymer, and acrylic polymer containing, as a primary component, a (meth)acrylic acid alkyl ester monomeric unit.