A mobile wireless terminal device that corresponds to a plurality of frequency bands as a wireless communication system, comprising: a first housing that contains a first substrate; an antenna that is disposed in an upper edge portion of the first housing; and a second housing that is disposed in the upper edge portion of the first housing in an openable/closeable manner through a hinge portion, and that contains a second substrate, the plurality of frequency bands including a first frequency band and a second frequency band that is different from the first frequency band, and the first substrate and the second substrate being electrically connected at each of connector portions (7, 8) by a cable including a ground and a signal line, characterized in that one or more current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153), each of which has a frequency characteristic of a predetermined impedance, are disposed at or near an edge portion of the first substrate or the second substrate on the cable, and an impedance of the current distribution control means is lower in the first frequency band than an impedance of the current distribution control means in the second frequency band, wherein in the first frequency band a current flows via the current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153) into a ground of the first or second substrate, on which the current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153) is disposed, due to the fact that the impedance of the current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153) is lower in the first frequency band than in the second frequency band, and in the second frequency band a current flows into the connector portion of the second substrate via the cable from the connector portion of the first substrate, and does not flow into the current distribution control means, due to the fact that the impedance of the current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153) is higher in the second frequency band than in the first frequency band. a first housing that contains a first substrate; an antenna that is disposed in an upper edge portion of the first housing; and a second housing that is disposed in the upper edge portion of the first housing in an openable/closeable manner through a hinge portion, and that contains a second substrate, the plurality of frequency bands including a first frequency band and a second frequency band that is different from the first frequency band, and the first substrate and the second substrate being electrically connected at each of connector portions (7, 8) by a cable including a ground and a signal line, characterized in that one or more current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153), each of which has a frequency characteristic of a predetermined impedance, are disposed at or near an edge portion of the first substrate or the second substrate on the cable, and an impedance of the current distribution control means is lower in the first frequency band than an impedance of the current distribution control means in the second frequency band, wherein in the first frequency band a current flows via the current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153) into a ground of the first or second substrate, on which the current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153) is disposed, due to the fact that the impedance of the current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153) is lower in the first frequency band than in the second frequency band, and in the second frequency band a current flows into the connector portion of the second substrate via the cable from the connector portion of the first substrate, and does not flow into the current distribution control means, due to the fact that the impedance of the current distribution control means (10, 11, 12, 13, 121, 122, 123, 131, 151, 152, 153) is higher in the second frequency band than in the first frequency band.