PROBLEM TO BE SOLVED: To provide a metal-containing film capable of suppressing decline of metal ion concentration in the film, in manufacturing the metal-containing film on the surface of a porous base material using a raw material containing a metal ion and liquid.SOLUTION: A structure 10 is equipped with a porous partition 14 to form a plurality of cells 12 in which a mixed fluid flows, and a functional layer 16 arranged on an inner surface 15 of the partition 14. The functional layer 16, which is a metal-containing film, is manufactured, for example, as follows. A film skeleton 16a is formed on the inner surface 15 of the partition 14, which is a porous base material, and brought into contact with an ion-introducing liquid 16b, which is a raw material containing a metal ion and liquid, to form the functional layer 16. The functional layer 16 is then dried by blowing air from a film surface 17 side of the functional layer 16 so that the liquid content in the functional layer 16 after 1-4 hours from the sta
