The present invention discloses a soft gum fingerstall oximeter without pivot structure, the soft gum fingerstall oximeter (21) comprises a soft gum fingerstall (11) which can wraps around a finger closely with variations of the profile of the finger and causes a clamping force distributed on the clamped portion of the finger uniformly. An emission circuit board and a reception circuit board are provided in the soft gum fingerstall (11). The soft gum fingerstall (11) of the oximeter (21) is enclosed, which can shield light entering from a side.