To provide an electrode for a battery having superior moldability, formed by uniformly dispersing electrode materials such as an active material in a matrix at high density, having superior adhesion with a collector and a large capacity, and little reducing the capacity even if repeating the charging/ discharging.

This electrode for the battery is characterized in including the active material for the electrode, and a carbon black composite polymer obtained by heating and mixing polymer I having reactivity to carbon black to the carbon black.