A shaping method for a three-dimensional shaped product, comprising a method for producing a three-dimensional shaped product, of which the essential aspects are formation of powder layers by movement of a squeegee and dispersion of powder on the top side of a shaping table and sintering of a shaping region by irradiation with a laser beam or an electron beam, the method employing following 1, 2, 3, 4, 5 processes: 1) setting a traveling distance of the squeegee in a linear direction after receiving supply of powder from a powder feeder, wherein the traveling distance is shorter than a full traveling distance with standard of chamber wall sections; 2) establishing locations of linear wall section layers connecting both ends at the chamber wall sections in a direction crossing with a traveling direction of the squeegee, within a traveling range of the squeegee based on the traveling distance set in the process 1; 3) forming powder layers by movement of the squeegee over the traveling distance set in the process 1; 4) forming sintered layers by irradiation with the laser beam or the electron beam on the powder layers formed by the process 3, and forming wall layers by irradiation with the laser beam or the electron beam at the locations of the wall layers established by the process 2; 5) repeating the processes 3 and 4 until reaching the top section of the three-dimensional shaped product; wherein the amount of powder at the squeegee is adjusted to minimize formation of excess powder layers on the outer sides of the wall layers; and wherein the powder layers formed by the process 3 have a thickness allowing them to maintain their laminated state at ends, and locations at the ends of the powder layers formed by the process 3 that are on an opposite side from the powder feeder coincide with locations at the ends of the wall layers formed by the process 4 that are at the location furthest from the powder feeder. 1) setting a traveling distance of the squeegee in a linear direction after receiving supply of powder from a powder feeder, wherein the traveling distance is shorter than a full traveling distance with standard of chamber wall sections; 2) establishing locations of linear wall section layers connecting both ends at the chamber wall sections in a direction crossing with a traveling direction of the squeegee, within a traveling range of the squeegee based on the traveling distance set in the process 1; 3) forming powder layers by movement of the squeegee over the traveling distance set in the process 1; 4) forming sintered layers by irradiation with the laser beam or the electron beam on the powder layers formed by the process 3, and forming wall layers by irradiation with the laser beam or the electron beam at the locations of the wall layers established by the process 2; 5) repeating the processes 3 and 4 until reaching the top section of the three-dimensional shaped product; wherein the amount of powder at the squeegee is adjusted to minimize formation of excess powder layers on the outer sides of the wall layers; and wherein the powder layers formed by the process 3 have a thickness allowing them to maintain their laminated state at ends, and locations at the ends of the powder layers formed by the process 3 that are on an opposite side from the powder feeder coincide with locations at the ends of the wall layers formed by the process 4 that are at the location furthest from the powder feeder. wherein the amount of powder at the squeegee is adjusted to minimize formation of excess powder layers on the outer sides of the wall layers; and wherein the powder layers formed by the process 3 have a thickness allowing them to maintain their laminated state at ends, and locations at the ends of the powder layers formed by the process 3 that are on an opposite side from the powder feeder coincide with locations at the ends of the wall layers formed by the process 4 that are at the location furthest from the powder feeder.