According to the present invention, there are provided an electromagnetic interference suppression material capable of exhibiting a good low-pass filter characteristic in an extensive frequency band ranging from a low frequency to a high frequency, and an electromagnetic interference suppression sheet using the electromagnetic interference suppression material. When laminating a conductive layer having a surface electrical resistance of 100 to 5000Ω/□ in which 5 to 25% by volume of a conductive carbon is mixed, and a magnetic layer having a magnetic permeability with an actual number portion of 3 to 45 in which a magnetic material is mixed, to each other, it is possible to obtain an electromagnetic interference suppression sheet suitable for high-density packaging of electronic equipments which is excellent in low-pass filter characteristic in a near electromagnetic field.