The subject is to provide an information processing apparatus serving as a wearable device, which makes it possible not only to reduce the divergence of data toward the peripheral spaces, but also to eliminate the electrode to be contacted to the surface of the living body when wearing it, and further, which is superior in the transmitting efficiency. The information processing apparatus is provided with information processing section 101 to conduct various kinds of information processing; wearing section 170 to make the information processing section wearable onto a living body, by surrounding a part of the living body; antenna section 180 formed in the wearing section and serving as either a loop antenna or a dipole antenna; and communicating section 160 to conduct a wireless communication with an external device by transmitting data, processed by the information processing section, to the external device through the antenna section, or by feeding data, received from the external device through the antenna section, into the information processing section.