A cuff (130) for a blood pressure monitor includes a bag-shaped cover body containing an air bag and a curled elastic member as a curved elastic plate. The bag-shaped cover body is formed by stacking an inner cover member (141) located on a living body side when applied and an outer cover member (142) located on a side opposite to the living body side when applied, one on the other, and sewing their rims. The curled elastic member contained in the bag-shaped cover body includes a large curvature region and a small curvature region in a winding direction thereof to fit a measurement site. In a state where the air bag is not inflated, the inner cover member (141) at a portion corresponding to the large curvature region of the curled elastic member is stretched in a width direction thereof. With this configuration, a cuff for a blood pressure monitor which is less likely to have wrinkles in a bag-shaped cover body can be provided.
