Provided is a wireless-type subject in-vivo information acquiring apparatus that is introduced into a body cavity of an individual to be examined and acquires subject in-vivo information, and that includes a transmission antenna that has an antenna orientation direction in which a transmission signal that transmits acquired subject in-vivo information is emitted most strongly, and another antenna that has an antenna directivity in a predetermined direction that is different from that of the transmission antenna. The transmission antenna and the other antenna are arranged so that a relationship between the antenna orientation direction of the transmission antenna and the antenna orientation direction of the other antenna is a twisted positional relationship or an intersecting relationship.
