Honeycomb structural body and exhaust gas conversion apparatus

A honeycomb structural body comprising:

• the honeycomb structural body having a substantially circular-pillar shape or a substantially elliptical-pillar shape;
• a plurality of honeycomb units adhered to each other by interposing an adhesive layer, each of the plurality of honeycomb units containing a conductive ceramic material and having a substantially fan shaped cross section or a substantially elliptical fan shaped cross section perpendicular to a longitudinal direction of each of the plurality of honeycomb units, each of the plurality of honeycomb units comprising:
• cell walls extending along the longitudinal direction to define a plurality of through-holes;
• and
• first and second electrodes provided at a part of an outer peripheral surface of each of the plurality of honeycomb units that does not face the adhesive layer and provided at a first area between each of the plurality of honeycomb units and the adhesive layer, and/or the first and second electrodes being provided at a second area between the outer peripheral surface of each of the plurality of honeycomb units and the adhesive layer and provided at a third area including a center of the substantially fan shaped cross section or the substantially elliptical fan shaped cross section.