A contactless information communication terminal device that performs transmission and reception of a signal in a contactless manner with a plurality of communication devices that use different frequencies when performing transmission, comprising: a base material; a first antenna (301-1, 301-2) that is formed on the base material and that transmits and receives a first signal having a first frequency; a first processing circuit that is connected to the first antenna and that, when the first signal is received by the first antenna, performs a predetermined first process based on the first signal and that outputs a signal corresponding to the processed results, as a first processed signal, to the first antenna; a second antenna that is formed on the base material and that transmits and receives a second signal having a second frequency, which is different from the first frequency; and a second processing circuit that is connected to the second antenna and that, when the second signal is received by the second antenna, performs a predetermined second process based on the second signal and that outputs a signal corresponding to the processed results, as a second processed signal, to the second antenna, wherein the first antenna and the second antenna are isolated from each other and establish electric-field coupling with each other, characterised by a part of the first antenna and the second antenna are separated from each other by a space therebetween and are formed on a first surface of the base material, another part of the first antenna (301-2a, 301-2b) is formed on a second surface of the base material different from the first surface, and the another part of the first antenna and the second antenna establish electric-field coupling via the base material. a base material; a first antenna (301-1, 301-2) that is formed on the base material and that transmits and receives a first signal having a first frequency; a first processing circuit that is connected to the first antenna and that, when the first signal is received by the first antenna, performs a predetermined first process based on the first signal and that outputs a signal corresponding to the processed results, as a first processed signal, to the first antenna; a second antenna that is formed on the base material and that transmits and receives a second signal having a second frequency, which is different from the first frequency; and a second processing circuit that is connected to the second antenna and that, when the second signal is received by the second antenna, performs a predetermined second process based on the second signal and that outputs a signal corresponding to the processed results, as a second processed signal, to the second antenna, wherein the first antenna and the second antenna are isolated from each other and establish electric-field coupling with each other, characterised by a part of the first antenna and the second antenna are separated from each other by a space therebetween and are formed on a first surface of the base material, another part of the first antenna (301-2a, 301-2b) is formed on a second surface of the base material different from the first surface, and the another part of the first antenna and the second antenna establish electric-field coupling via the base material.