PURPOSE: To easily shape a quarried stone to a natural garden stone, by constituting a laterally long drum of hollow semicircular structures, which can be divided into the upper and the bottom, to be placed between front and rear wheels, rotatably supported to a turning device, and placing the quarried stone in the drum with gravel and water to be turned.

CONSTITUTION: A machine, which constitutes a laterally long hollow drum 1 of hollow semicircular structures 2, 20 separable into the upper and the bottom, is equipped with a turning device 30 for the drum 1 being constituted of a base bed 31, supporting wheels 34, 35 mounted to the point part of supporting shafts supported before and after said base bed 31 and a driving shaft 37 transmitting power 38 to the supporting shaft. And the machine, which places a quarried stone of width about 1/2 times the diameter R of the drum and a suitable amount of gravel in the drum by removing its upper positioned semicircular structure 2 and integrally fixes the upper and bottom semicircular structures 2, 20, fills the drum with water to be turned by the turning device 30. Then the machine, in which the fellow quarried stones or the quarried stone and the gravel in the drum suitably collide and/or rub with each other removing a corner of the quarried stone and generating ruggedness during that time, shapes the quarried stone into a garden stone just as found out from the natural field. Accordingly, the quarried stone can be easily formed into a shape of the natural garden stone.