To easily peel a confidential postcard at the time of tearing the postcard in an improvement in a peelable laminate film core material used for the postcard and an improvement in a peelable laminate film.

The peelable laminate film core material is made of a laminate of a film 1 of unoriented polypropylene or oriented polypropylene and a film 4 of polyethylene. Particularly, it is manufactured by adhering polyethylene resin heated to 290 to 340°C or preferably 300°C onto the film 1 of the unoriented polypropylene or oriented polypropylene, and forming the film of polyethylene.