To provide a highly reliable thermal power generation module by using a cordierite mold which is excellent in electric and thermal insulation, which is low in costs, and which is high in mechanical strength.

This thermal power generation module is configured by alternately arraying p-type electro-thermal elements and n-type electro-thermal elements in a mold having a plurality of through-holes parted by barrier plates. This mold for the thermal power generation module is configured of ceramic using cordierite whose porosity is 10% or more and 40% or less as main components.