CARBON MATERIAL COMPOSITION

The present invention provides a carbon material composition excellent in the dispersibility of a fibrous carbon material and capable of reducing electrode resistance. Provided is a carbon material composition containing: a fibrous carbon material; a water-based solvent; and a polyvinyl acetal resin, the polyvinyl acetal resin having an acetal group content of 40.0 mol % or less and a blockiness of hydrophobic groups measured by NMR of 0.35 or greater and 0.80 or less.