A finger clamping device includes a casing, an upper clamping member, and a lower clamping member. The casing includes an inner sidewall. A sliding rail is arranged on the inner sidewall. The upper clamping member is arranged in the casing and defines a rotation shaft. The rotation shaft is received in the sliding rail and capable of sliding along the sliding rail. The lower clamping member faces to the upper clamping member and is connected to the upper clamping member by a torsional spring. When a finger of a user inserts between the upper clamping member and the lower clamping member, the torsional spring is stretched, and the upper clamping member and the lower clamping member cooperatively clamp the finger of the user. An oximeter with the finger clamping device is also provided.本發明提供一種手指夾持裝置，包括殼體，上夾板及下夾板。該殼體包括有一內壁，該內壁上設置有至少一條滑軌。上夾板設置於所述殼體中，該上夾板朝向內壁的一側設置有一轉軸，該轉軸收容於該滑軌中並能夠沿該滑軌滑動。下夾板與該上夾板相對設置並藉由扭簧與該上夾板連接。當用戶手指伸入該上夾板與下夾板之間時，該扭簧被拉伸，該扭簧處於拉伸狀態下的彈性回復力使得該上夾板與下夾板實現對用戶手指的夾持。本發明還提供一種具有手指夾持裝置的血氧儀。
