NOVELTY - A thermal transfer film (10) consists of base film (11), surface protective layer (12), primer layer (13) and contact bonding layer (14), provided in order. The base film contains polyester resin film or extended-polyolefin resin film. The surface protective layer contains hardened material of the curable resin composition containing polyfunctional urethane(meth)acrylate and caprolactone-type (meth)acrylate. The primer layer is formed using resin composition containing binder resin and anti-blocking agent. The thickness of contact bonding layer is more than the primer layer.    USE - Thermal transfer film is used for hard-coat components (claimed). Uses include but are not limited to grading components of motor vehicle interior and exterior claddings, solar cell components, domestic electrical appliances, roof components, windows of vehicles and buildings, sound insulating walls, wind-shield walls, lens for display units e.g. mobile telephones, signal apparatus, optical instruments, etc.    ADVANTAGE - The thermal transfer film stably and efficiently provides hard-coat component with excellent weather resistance, contraction resistance, transparency, hard-coat property, bending workability, anti-fouling property and self-purification property.    DETAILED DESCRIPTION - A thermal transfer film consists of a base film, a surface protective layer, a primer layer, and a contact bonding layer provided in order. The base film contains polyester resin film or extended-polyolefin resin film. The surface protective layer contains hardened material of the curable resin composition containing polyfunctional urethane(meth)acrylate and caprolactone-type (meth)acrylate. The primer layer is formed using resin composition containing binder resin and anti-blocking agent. The thickness of contact bonding layer is more than the primer layer. The elongation rate of the primer layer is 110% or more, measured by the method, which involves applying primer layer formation resin composition on an un-treated polyethylene terephthalate resin film to form 10 mu m thick coating film, peeling the obtained coating film from the polyethylene terephthalate resin film, and punching the test sheet into dumbbell-shape, and measuring elongation rate of test sheet based on JIS K6732, using compression tester at 25 degrees C, tensile velocity of 50 mm/minute and chuck intervals of 100 mm. An INDEPENDENT CLAIM is included for hard-coat component, which consists of thermal transfer film and to-be-transferred component.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic cross-sectional view of the thermal transfer film.    Thermal transfer film (10)    Base film (11)    Surface protective layer (12)    Primer layer (13)    Contact bonding layer (14)