To easily cause a turbulent flow of an exhaust gas in a cell passage 2 of a honeycomb carrier.

A honeycomb carrier to be adopted has a constitution that both ends of the cell passage 2 are opened and many continuous holes 4 connecting the cell passages are opened on the surface of a cell wall 1 over the entire length of the cell passage 2. A catalyst layer 3 is formed on the surface of the cell wall 1, and the irregularity of the catalyst layer surface is enlarged by using the continuous holes 4. A thin layer part 3a with the catalyst layer 3 of a thickness smaller than the thickness of the region before and after the part 3a in the longitudinal direction is formed on an intermediate part in the longitudinal direction of the cell passage 2.