The present invention, a device for measuring the thickness of the finger, a fixed ring having a constant diameter； A first unit ring having a constant diameter, a gear having a larger diameter than the first unit ring, a gear tooth protruding from an outer circumferential surface thereof, a second unit ring disposed coaxially with the first unit ring, and an elastic body 3 unit ring and a constant length, one end is rotatably connected to the second unit ring, the middle portion is rotatably connected to the first unit ring, the other end is connected to the outer periphery of the third unit ring A variable ring including a plurality of variable rods, and a plurality of connection rods connecting the fixing ring and the first unit ring to fix the first unit ring, the variable ring disposed inside the fixing ring； A variable unit configured to rotate the second unit ring to change the diameter of the third unit ring； a third unit disposed at a connection portion between the first unit ring and the variable rod to measure an inclination of the variable rod； It provides a finger thickness measuring device including a measuring unit for outputting the diameter value of the ring and a display unit for informing the user of the diameter value output from the measuring unit. According to the present invention, a finger is inserted into the center of the third unit ring 122C whose diameter is continuously changed, and a finger is formed by the diameter of the third unit ring 122C when the inner circumferential surface of the third unit ring 122C contacts the finger skin. It can represent thickness.본 고안은, 손가락의 굵기를 측정하는 장치로서, 일정한 직경을 갖는 고정링； 일정한 직경을 갖는 제1 단위링과, 상기 제1 단위링보다 큰 직경을 갖고 외주면으로는 기어이가 돌출되며, 상기 제1 단위링과 동축상으로 배치되는 제2 단위링과, 탄성체를 포함하는 제3 단위링과, 일정한 길이로 이루어져, 일단은 상기 제2 단위링에 회전 가능하게 연결되고, 중간부는 상기 제1 단위링에 회전 가능하게 연결되며, 타단은 상기 제3 단위링의 외주에 연결되는 복수의 가변 로드와, 상기 고정링과 상기 제1 단위링을 연결하여 상기 제1 단위링이 고정되도록 하는 복수의 연결 로드를 포함하고, 상기 고정링의 내측으로 배치되는 가변링； 상기 제3 단위링의 직경이 변화되도록 상기 제2 단위링을 회전시키는
