To provide a high temperature air filter which can keep capture performance even if an air filter which is comprised of filter paper made of inorganic fibers, which is in danger of degrading the strength at high temperature because of using an organic binder in a filtering medium, and a sealing material using an inorganic adhesive which is in danger of generating a crack is used at high temperature.

In a high temperature air filter 10 where a filtering medium 1 which consists of filter paper made of inorganic fibers formed by binding inorganic fibers to each other with an organic binder is folded zigzag and corrugated separators 2 are inserted into a space made by folding to form a filter pack 8, and the upper and lower end parts of the filter pack 8 are fixed on an outer frame through an inorganic adhesive 3 and a cushioning material 5 made of the inorganic fibers, a core material is laid on the inorganic adhesive 3.