Aluminum fin material for indoor unit of air conditioner and manufacturing method of aluminum fin material

Provided is an aluminum fin material for an indoor unit of an air conditioner, comprising: a base material comprising aluminum or an aluminum alloy; a chromate phosphate coating film on or on the surface of the substrate; a first coating film comprising a dried cured product of a first composition on the surface or on the surface of the chromate phosphate coating film; and a second coating film on the surface of the first coating film, the second coating film comprising a dried cured product of a second composition, the first composition comprising: a cationic polyurethane resin; a compound having an amino group and a nitrile group; and a second composition including: a compound having an amino group and a nitrile group, the compound including at least one of a group consisting of water and a water-miscible organic solvent; a polymer containing a sulfonyl group and a carboxyl group or a salt thereof; a polymer having a repeating structure of-[CH2-CH (OH)]-or a salt thereof; and at least one type of compound s