Patent ID: 8615876

Claim:
A method for manufacturing a honeycomb structural body comprising a honeycomb unit, the method comprising: obtaining a honeycomb molded body comprising a compound containing a phosphate group zeolite and an inorganic binder, the honeycomb molded body having a plurality of through holes that are defined by cell walls and arranged in a longitudinal direction of the honeycomb molded body; drying the honeycomb molded body; firing the dried honeycomb molded body to obtain the honeycomb unit; and storing at least one of the honeycomb unit and the dried honeycomb molded body so that a difference in moisture content is approximately 5 mass % or less between a moisture content of the cell walls at a center part of a cross section perpendicular to the longitudinal direction and a moisture content of the cell walls at an outer periphery part of the cross section perpendicular to the longitudinal direction, wherein the storing step of the dried honeycomb molded body comprises allowing air to flow through the plurality of through holes, the air having humidity that is approximately 20% RH or more and approximately 60% RH or less.