A blood pressure measuring device includes a device main body; a curler configured to bend along a circumferential direction of a wrist of a living body, including one end and another end separated from each other, also configured to come into contact with a portion of the wrist at least between a dorsal side and a palmar side; a strap provided to the device main body; a sensing cuff arranged in a region of the wrist where arteries exist; a back plate provided between the curler and the sensing cuff and extending in a circumferential direction of the wrist; a pressing cuff provided on a side of the curler nearer to the strap and configured to press the sensing cuff; and a cuff provided on a side of the curler nearer to the living body and arranged on the dorsal side of the wrist.