According to an aspect of the present invention, there is provided a radio system including: a first radio apparatus that has a first loop antenna; and a second radio apparatus that has a second loop antenna and that performs a radio communication with the first radio apparatus when the second loop antenna is opposed with the first loop antenna, wherein the second radio apparatus has a shield member that is formed of a magnetic substance and disposed to shield at least a portion of the second loop antenna with respect to the first loop antenna when the radio communication is performed.