PROBLEM TO BE SOLVED: To match a blood pressure cuff with a length of an arm circumference of a patient.SOLUTION: A blood pressure cuff 100 includes an alignment tub part 104, a sleeve 112, and an air chamber 102 accommodated in the sleeve 112. The air chamber 102 includes a first rectangular portion having a first width, a second rectangular portion having a second width larger than the first width, and a taper portion that extends between the first rectangular portion and the second rectangular portion. The taper portion may be a straight taper 108 or a curved taper. A length from an edge of the alignment tub part 104 to a second end of the first rectangular portion adjacent to the taper portion is substantially equal to a minimum arm circumferential value of the blood pressure cuff.SELECTED DRAWING: Figure 1
