To provide a measuring apparatus and a diagnostic system capable of improving measurement accuracy of biological information.A measurement device includes a measurement unit that measures information on a blood flow of a subject, an attachment unit that is attached to the subject, an elastic material that connects the measurement unit to the attachment unit, And a connecting portion 130 made of a metal.BACKGROUND OF THE INVENTION【課題】生体情報の測定精度を向上可能な測定装置及び診断システムを提供する。【解決手段】測定装置100は、被検者の血流に関する情報を測定する測定部120と、被検者に装着される装着部110と、測定部120と装着部110とを連結する弾性材料からなる連結部130と、を備える。【選択図】図1