Stereolithography method for producing a three-dimensional object through the superimposition of a plurality of layers on one another, comprising the following operations: a. application of a base substance to a supporting surface, said base substance being liquid or pasty and being suited to be solidified through exposure to predefined radiation; b. selective irradiation of a layer of said base substance having a predefined thickness and being in contact with said supporting surface through said predefined radiation, in such a way as to obtain a solidified layer; c. separation of said solidified layer from said supporting surface through a movement intended to move them away from each other, wherein - said supporting surface belongs to a first laminar element and to a second laminar element; said operation of applying said base substance to said supporting surface is carried out by depositing a single layer of said base substance so that it comes into contact with said second laminar element, said single layer having a thickness at least corresponding to said predefined thickness, said depositing operation being carried out selectively only in the areas corresponding to the volume of said three-dimensional object according to a digital model of a corresponding layer of the three - dimensional object to be obtained; - said operation of selective irradiation is carried out on said first laminar element only in the areas corresponding to the volume of said three - dimensional object and at the same time as said operation of applying said base substance to said second laminar element, the operation of applying said base substance to said first laminar element having been performed before said operation of applying said base substance to said second laminar element. a. application of a base substance to a supporting surface, said base substance being liquid or pasty and being suited to be solidified through exposure to predefined radiation; b. selective irradiation of a layer of said base substance having a predefined thickness and being in contact with said supporting surface through said predefined radiation, in such a way as to obtain a solidified layer; c. separation of said solidified layer from said supporting surface through a movement intended to move them away from each other, wherein - said supporting surface belongs to a first laminar element and to a second laminar element; said operation of applying said base substance to said supporting surface is carried out by depositing a single layer of said base substance so that it comes into contact with said second laminar element, said single layer having a thickness at least corresponding to said predefined thickness, said depositing operation being carried out selectively only in the areas corresponding to the volume of said three-dimensional object according to a digital model of a corresponding layer of the three - dimensional object to be obtained; - said operation of selective irradiation is carried out on said first laminar element only in the areas corresponding to the volume of said three - dimensional object and at the same time as said operation of applying said base substance to said second laminar element, the operation of applying said base substance to said first laminar element having been performed before said operation of applying said base substance to said second laminar element. - said supporting surface belongs to a first laminar element and to a second laminar element; said operation of applying said base substance to said supporting surface is carried out by depositing a single layer of said base substance so that it comes into contact with said second laminar element, said single layer having a thickness at least corresponding to said predefined thickness, said depositing operation being carried out selectively only in the areas corresponding to the volume of said three-dimensional object according to a digital model of a corresponding layer of the three - dimensional object to be obtained; - said operation of selective irradiation is carried out on said first laminar element only in the areas corresponding to the volume of said three - dimensional object and at the same time as said operation of applying said base substance to said second laminar element, the operation of applying said base substance to said first laminar element having been performed before said operation of applying said base substance to said second laminar element.