an anisotropic conductive sheet capable of transmitting high - speed digital signals reliably is provided . the anisotropic conductive sheet has a conductive property in a thickness direction thereof under a predetermined condition , and includes : insulative matrix members having a dielectric constant value of at most 2 . 28 and a dielectric loss value of at most 0 . 025 ; and conductive members having a conductive property in the thickness direction under the predetermined condition in the conductive members capable of flowing electricity between top and bottom surfaces thereof are located in a scattered manner in the matrix members , and the conductive and matrix members are bonded chemically . especially , the matrix member is made from a resin material having a resin foamed body of a foaming structure , i . e . homogeneous microcell structure . at least one of the conductive members may be of conductive elastomer .