The purpose of the present invention is to provide: a dispersant for resin collectors, which enables uniform dispersion of a conductive filler and development of sufficient charge/discharge characteristics without deteriorating output increase per unit weight of a battery, said output increase being achieved by weight reduction due to a characteristic of a resin collector; a material for resin collectors; and a resin collector. A material for resin collectors according to the present invention is a dispersant for resin collectors, which is composed of a polymer having a resin-philic block (A1) and a conductive filler-philic block (A2), and is characterized in that: the resin-philic block (A1) is a polymer block that has an olefin (a1) having 2-30 carbon atoms as an essential constituent monomer and a functional group of the conductive filler-philic block (A2) is at least one group that is selected from the group consisting of a carboxyl group, a 1,3-dioxo-2-oxapropylene group, an ester group, a cyano group, a hydroxyl group, an amino group, an amide group or an imide group; or the polymer having a resin-philic block (A1) and a conductive filler-philic block (A2) is a ring-opening polymerization type polyester, a dehydration condensation type polyester or a polycarbonate.