PROBLEM TO BE SOLVED: To provide a leg length measurement device capable of objectively measuring a leg length without damaging bones and muscles with a simple constitution.SOLUTION: A leg length measurement device includes: a first axis part 11 configured so as to be locked with a pair of the anterior superior iliac spine of a patient U a pair of second axis parts 12 one end of which can be connected with the end parts of the first axis part in an axis line direction and which are provided in the vicinity of both ends of the first axis part so as to extend in a second direction orthogonal to the first direction parallel to the axis line direction of the first axis part when connected and a measurement part 13 which is configured so as to be connected with the other ends of the second axis parts, is arranged along the first direction when connected, is configured so that the heel part of the measurement target patient can be placed thereon and is provided with a guide part capable of measuring the position of the heel part.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT