A blood pressure measurement cuff includes a clamp mechanism that sandwiches a measurement site. The clamp mechanism includes a first clamp portion having a shape that is curved along a first half of the measurement site and a second clamp portion having a shape that is curved along a second half of the measurement site. The slide hole is formed penetrating through one end portion of the first clamp portion. The slide bar extends from the one end portion of the second clamp portion and into the slide hole, fits therein, and slides with friction with respect to the slide hole. The slide hole and the slide bar are curved so as to protrude on a side near other end portions of the first clamp portion and the second clamp portion.
