Dicing sheet base material film, a dicing sheet comprising the base film, and the method of manufacturing a base film

The base film of the dicing sheet (2) is provided with cutting pieces suppressing layer (A), the cutting pieces suppressing layer (A) while expanding layer laminated on the main surface of the (B), expanding layer ( B) has a laminated structure of a plurality of resin-based layered body, among shavings suppressing layer (a) to the most proximal to arranged the resin-based layered body of a plurality of resin-based layered body (B1) is a linear the Jo polyethylene as a main resin, a resin-based layered body of a plurality of resin-based layered body (B1) other than the at least one in which the resin-based layered body (B2) is an ethylene - (meth) mainly acrylic acid copolymer a resin, shavings suppressing layer (a), the aromatic ring and aliphatic ring-containing resin is a thermoplastic resin having at least one ring (a1), olefin other than ring-containing resin (a1) acyclic olefin resin is a thermoplastic resin (a2) and containing To. The base film of such dicing sheet (2) is excellent in expandability and resiliency.