Abstract: A method of manufacturing a honeycomb structured body, includes providing an application jig. A sealing material paste is put on a peripheral surface of a pillar-shaped ceramic block. The application jig is set in such a manner that a first principal surface of the application jig faces upward and a second principal surface of the application jig faces downward. The ceramic block is placed inside a second opening section of the application jig. The ceramic block is passed through an opening section of the application jig so that a face defining the second opening section spreads an entire peripheral surface of the ceramic block with the sealing material paste to manufacture a honeycomb structured body with a peripheral sealing material layer formed on the peripheral surface of the ceramic block.

Abstract: An application jig includes a first principal surface, a second principal surface, and an opening section. The second principal surface is provided on an opposite side of the first principal surface. The opening section penetrates from the first principal surface to the second principal surface and includes a first opening section and a second opening section. The first opening section is provided on the first principal surface side. The second opening section is provided on the second principal surface side and has a substantially constant diameter from the second principal surface toward a boundary line between the first opening section and the second opening section. The first opening section has a diameter gradually decreasing from the first principal surface toward the boundary line.