NOVELTY - A biaxial-oriented-film composite sheet is a composite sheet obtained by laminating nonwoven fabric layer (B) comprising polyarylene sulfide fiber on 1 or more surfaces of biaxially-oriented thermoplastic resin film layer (A) comprising polyarylene sulfide resin without using adhesive agent. The nonwoven fabric layer (B) forms net-like component in which fibers are melted. The difference in glass-transition temperature (TgA) of thermoplastic resin in layer (A) and glass-transition temperature (TgB) of polyarylene sulfide contained in layer (B) is (-5)-(15) degrees C.    USE - Biaxial-oriented-film composite sheet is used for insulating paper for motor (all claimed). Uses include but are not limited to transformer, insulated cable, circuit board material, lithium-ion battery material, loudspeaker diaphragm, compressor motor for car air-conditioner, solar cell material, fuel cell material, optical material, hybrid vehicle, etc.    ADVANTAGE - The electrical insulation material formed using the biaxial-oriented-film composite sheet has excellent workability, heat resistance, chemical resistance, low hygroscopic property, interface adhesiveness and varnish impregnability.    DETAILED DESCRIPTION - A biaxial-oriented-film composite sheet is a composite sheet obtained by laminating nonwoven fabric layer (B) comprising polyarylene sulfide fiber on 1 or more surfaces of biaxially-oriented thermoplastic resin film layer (A) comprising polyarylene sulfide resin without using adhesive agent. The nonwoven fabric layer (B) forms net-like component in which fibers are melted. The difference in glass-transition temperature (TgA) of thermoplastic resin in layer (A) and glass-transition temperature (TgB) of polyarylene sulfide contained in layer (B) is (-5)-(15) degrees C. The breaking elongation of composite sheet is 70% or more. An INDEPENDENT CLAIM is included for manufacture of biaxial-oriented-film composite sheet, which involves laminating and bonding nonwoven fabric to thermoplastic resin film by thermocompression, and co-extending in biaxial direction.