<p>The present invention aims to provide a catalyst supporting honeycomb which can reduce the increase with time in the pressure loss upon an influx of soot. The catalyst supporting honeycomb of the present invention includes a pillar-shaped honeycomb structured body having a plurality of cells formed in parallel with one another in a longitudinal direction with a cell wall interposed therebetween, and a catalyst particles 204 supported on the honeycomb structured body, and in this structure, an oxide catalyst is used for the catalyst particles 204 and the average particle diameter thereof is 0.05 µm to 1.00 µm.</p>
