The paper composite contains: a paper substrate having an air permeation resistance of 1,000 sec or less and bulk density of from 0.5 to 1.0 g/cm3; and a greaseproof layer on at least one side thereof, the greaseproof layer containing an ethylene-vinyl alcohol polymer (A) and a cationic fluorine-containing polymer (B) having two specific constitutional units. A content of the copolymer (B) in the greaseproof layer is from 5 to 50 parts by mass with respect to 100 parts by mass of the polymer (A), an amount of the greaseproof layer on dry mass basis is from 0.1 to 3.0 g/m2, and a water vapor permeability of the paper composite is 1,000 g/m2·24 h or greater.