In the diagnostic imaging apparatus, wear of a metal contact type rotary connector is reduced. In the diagnostic imaging apparatus according to the present invention, a probe including a first transmission / reception unit that repeats transmission / reception of electrical signals and a second transmission / reception unit that repeats transmission / reception of optical signals is detachably connected. By rotating the second transmission / reception unit, a reflection signal in the body cavity can be acquired from the first or second transmission / reception unit, and a tomographic image in the body cavity can be generated based on the acquired reflection signal. And an electrical rotary connector 526 for transmitting the electrical signal and an optical rotary connector for transmitting the optical signal in a state where the first and second transmission / reception units are rotated. 526 includes metal surfaces 522 and 523 attached to the rotation drive unit side and brushes 524 and 525 attached to the fixed unit side, and the brushes 524 and 525 are in contact and non-contact positions. In between, characterized in that it is operable.画像診断装置において金属接触式のロータリコネクタの摩耗を低減させる。本発明に係る画像診断装置は、電気信号の送受信を繰り返す第１の送受信部と光信号の送受信を繰り返す第２の送受信部とを備えるプローブが着脱可能に接続され、体腔内において該第１及び第２の送受信部を回転動作させることで、該第１または第２の送受信部より体腔内での反射信号を取得し、該取得した反射信号に基づいて該体腔内の断層像を生成可能であり、前記第１及び第２の送受信部を回転動作させた状態で、前記電気信号の伝達を行う電気ロータリコネクタ５２６と、前記光信号の伝達を行う光ロータリコネクタと、を備え、電気ロータリコネクタ５２６は、回転駆動部側に取り付けられた金属面５２２、５２３と、固定部側に取り付けられたブラシ５２４、５２５とを備え、該ブラシ５２４、５２５は、接触位置と非接触位置との間において、動作可能であることを特徴とする。
