A honeycomb structure includes a plurality of pillar-shaped honeycomb fired bodies, each having a large number of cells longitudinally placed in parallel with one another with a cell wall therebetween. The honeycomb fired bodies are combined with one another by interposing adhesive layers containing at least ceramic particles. In the ceramic particles contained in the adhesive layers, the number of those particles having a particle diameter larger than an average pore diameter of the honeycomb fired body is set to 30% or less of the total number of the ceramic particles.