Is to provide a portable ultrasonic diagnostic apparatus compact with excellent operability. The connecting main body housing having an operation unit arrangement surface on the top surface, and a cover housing having a display device and one end of the cover housing and the rear of the main body housing, hiding and said display unit and the operation unit arrangement surface The portable ultrasonic diagnostic apparatus including a connecting portion which is foldable so that, in the operation unit arrangement surface, and a second operating unit including a keyboard and a first operating unit with a trackball The first operation unit is disposed at a position lower than the second operation the group.操作性に優れたコンパクトな携帯型超音波診断装置を提供する。上面に操作部配置面を備えた本体筺体と、表示装置を備えた蓋筺体と、前記本体筺体の後部と前記蓋筺体の一端とを連結し、前記操作部配置面と前記表示装置とを隠蔽するように折りたたみ可能とする連結部とを備えた携帯型超音波診断装置において、前記操作部配置面には、トラックボールを備えた第1操作群とキーボードを含む第2操作群とを有し、前記第1操作群は前記第2操作群よりも低い位置に配置されている。
