To provide a halogen free and highly thermostable electromagnetic wave absorption material which comprises a soft magnetic material dispersed in a matrix of acrylic rubber and has implemented high flame retardant properties without reducing workability.

One or both of melamine or melamine derivative (C), one or both of red phosphor or ammonium polyphosphate (D), or one kind or two or more kinds of pentaerythritol, dextrin and polyvinyl acetate (E) is added in the form of (C), a mixture of (C) and (D), or a mixture of (C), (D) and (E) to the electromagnetic wave absorption material as a flame retardant or a flame retardant auxiliary and is molded.