A blood pressure measuring device includes a holder configured to be mounted on a wrist of a living body and come into contact with a portion of the wrist at least between a dorsal side and a palmar side; a sensing cuff provided on a side of the holder nearer to the living body and arranged in a region of the wrist where arteries exist; and a cuff provided on a side of the holder nearer to the living body and arranged on the dorsal side of the wrist.