PURPOSE: To pack the space formed between a top corrugated plate and a bottom corrugated plate with a solid catalyst by arranging the top and bottom corrugated plates so that the trough parts of the former are brought into-contact with the ridge parts of the latter and fixing both plates at the end parts thereof by a fixing means.

CONSTITUTION: A pair of corrugated plates 1a, 1b are arranged so as to cross each other to bring the trough parts 2a of the corrugated plate 1a and the ridge parts 2b of the corrugated plate 1b to a point contact state. Therefore, spaces having a complicated internal structure are formed and these complicated spaces are packed with a solid catalyst to obtain a packing material generating no channeling and excellent in chemical reactivity and gas-liquid contact properties. In the packing material for reactive distillation, the spaces for the packing with the solid catalyst are formed and held without performing a welding process or the like. As a result, the spaces between both corrugated plates can be packed with the solid catalyst optimal corresponding to temp., pressure or the kind of a fluid.