To provide a composite film which has excellent resistance to pinhole formation, deep drawing formability and excellent hot water resistance and prevents a flange part of a package from being curled.

A co-extruded composite film for deep-drawn packaging is a co-extruded laminated film obtained by laminating an outermost layer/an inner layer/a seal layer in this order, wherein the outermost layer comprises a polyethylene layer or the ethylene-vinyl acetate copolymer layer, the inner layer includes an ethylene-vinyl acetate copolymer layer, a polyamide resin layer and an ethylene-vinyl acetate copolymer-saponified article layer, and the seal layer comprises a straight-chain low-density polyethylene layer. A deep-drawn package for ceramic capacitors is obtained by using the co-extruded composite film for deep-drawing packaging as a bottom material.