A fixing device for an image forming apparatus of the present invention includes a rotary body and a pressing member pressed against each other for conveying a recording medium, carrying a non-fixed toner image thereon, while nipping it therebetween. The rotary member includes an under layer and a surface layer formed of resin. The surface layer has two or more phases including a phase strongly adhering to the under layer and another layer contacting the above phase.

 
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