Patent ID: 8912888

Claim:
An information storage medium comprising: a wireless IC tag in which information is stored; a sheet body including a first spacer having an arrangement surface on which the wireless IC tag is arranged, an auxiliary antenna provided on a surface opposite to the arrangement surface of the first spacer, having a hole, notch or gap, and a second spacer being opposite to the first spacer with respect to the auxiliary antenna; and an elongated member formed of a conductive material, the wireless IC tag being arranged on the arrangement surface without wire connection to the auxiliary antenna, and the elongated member being provided to be opposite to the wireless IC tag with respect to the sheet body, wherein the elongated member is a strip-shaped metal member or a rod-shaped metal member, and the elongated member including a portion having size of (λ/2)×n, wherein λ denotes a wavelength corresponding to a resonance frequency of the IC tag and n is an integer of 1 or more.