<p>The invention provides a cover film which permits a wide sealing trowel temperature range wherein satisfactory peel strength can be attained and which is excellent both in the uniformity of peel strength in peeling and in the heat-sealing properties for carrier tapes. A cover film constituted of a substrate layer and a sealant layer, characterized in that the substrate layer is made of biaxially oriented polyester and/or biaxially oriented polypropylene and that the sealant layer contains a resin (a) obtained by hydrogenating an aromatic vinyl/conjugated diene hydrocarbon block copolymer which resin has an aromatic vinyl content of 20 to 45% by mass and a flowability of 1 to 20g/10min at 230°C under a load of 2.16kgf as determined according to JIS K7210.</p>
