Honeycomb structure

A honeycomb structure comprising:

• a tubular honeycomb structure part having porous partition walls with which a plurality of cells extending from one end surface to the other end surface are formed to become through channels of a fluid and an outer peripheral wall positioned on an outermost periphery;
• and
• a pair of electrode parts arranged on a side surface of the honeycomb structure part,
• wherein an electrical resistivity of the honeycomb structure part is from 10 to 200 Ωcm,
• each of the pair of electrode parts is formed into a band-like shape extending in a direction in which the cells of the honeycomb structure part extend,
• in a cross section perpendicular to the cell extending direction, the one electrode part in the pair of electrode parts is disposed opposite to the other electrode part in the pair of electrode parts via the center of the honeycomb structure part, and
• the electrode part has portions having a thickness of 0 to 70% of the maximum thickness of the electrode part.