An imaging apparatus includes a pentaprism and outer covering members. Among the photographing light flux incident from a photographing optical system, light reflected by a rotary mirror is further reflected by the reflection surface of the pentaprism to thereby reach an ocular lens. A wireless substrate on which an antenna section is mounted is arranged between the pentaprism and a front outer cover. The substrate fixing member fixes the wireless substrate and is attached to a pentaprism fixing member so as to be electrically connected to the ground section of the imaging apparatus. The ground section of the wireless substrate is connected to the substrate fixing member at a position facing the antenna section with the optical axis of the eyepiece optical system therebetween. The electrical resistivity of a region facing the antenna section in the front outer cover is set relatively higher than the periphery of the region.