To provide a stick capable of being used as a crutch, a carrier and a walking aid as well as a stick and a stool.

The stick has a lower leg comprising a shaft 5 having a ferrule 4 detachably mounted on its tip, a cylinder 6 through one end of which the shaft 5 can be inserted inside and can be pulled out and a male thread 8 protruding on the other end of the cylinder 6, a shaft 12 with a grip part 11 mounted detachably and vertically in the T shape to its tip, an upper leg comprising a cylinder 13 through one end of which the shaft 12 can be inserted and pulled out and a male thread 15 protruding on the other end of the cylinder 13 and a body 1 having housing parts 2 and 3 into which the cylinder 6 of the lower leg and the cylinder 13 of the upper leg are inserted, respectively, with arranging their insertion directions being opposite to each other, female thread holes 9 and 10 provided in the deepest parts of the housing parts 2, 3 to be screwed on the male threads 8 and 15 and leg mounting seats 18 and 19 provided on both ends in one side of the body 1 to be screwed on the male threads 8, 15 of the lower leg and the upper leg.