A height measuring instrument includes a measuring box having a right-angled plate; a measuring tape having a scale and a space to record measured data, the measuring tape wounded onto means for winding within the measuring box when in a stored mode, being extended an optional length when in an operative mode; winding means provided within the measuring box and attached to one end portion of the measuring tape so as to wind the measuring tape by handling from the outside; means for marking the measured data on the measuring tape, the marking means being included: a measuring member formed in the shape of a plate and installed into the measuring box such that the measuring member can prevent to loosen and slide the measuring tape in an operative mode by a tension on the measuring tape when in fitting of a length of the measuring tape; a through hole formed on the measuring member and allowing writing goods to pass through therein order to record a mark on the measuring tape; a hole punch having a spring provided fixedly at the measuring member such that the hole punch mark the measured data on the measuring tape; and a step attached to another end portion of the measuring tape. Because the height measure is formed in this way, the measuring tape recorded the correct measured data of the height can be wound onto the shaft within the measuring box easily when the instrument not in measuring use, and it is a portable simply. Also, the measuring tape data can be kept as memorial goods for life.