A catalyst-carrying honeycomb that is capable of enhancing continuous soot regeneration characteristics and suppressing the amount of soot deposited over time on cell wall. The catalyst-carrying honeycomb is one having catalyst particles (204) supported by a columnar honeycomb structure having a multiplicity of cells aligned along the longitudinal direction with a cell wall interposed therebetween, characterized in that there are provided a large-capacity cell group hermetically sealed at one cell end and a small-capacity cell group hermetically sealed at the other end, and that oxide catalyst particles (204) of 0.05 to 1 [mu]m average particle diameter are supported by the structure.