A method for evaluating a vitreous silica crucible, comprising the steps of: moving an internal ranging section along an inner surface of the vitreous silica crucible in a contactless manner; measuring a distance between the internal ranging section and the inner surface as a distance from the inner surface, by subjecting the inner surface of the crucible to irradiation with laser light and then detecting a reflected light from the inner surface, the laser light being emitted from the internal ranging section in an oblique direction with respect to the inner surface, and the measurement being conducted at a plurality of measuring points along a course of a movement of the internal ranging section; obtaining a three-dimensional shape of the inner surface of the crucible, by associating three-dimensional coordinates of each of the measuring points with the distance from the inner surface moving an external ranging section along an outer surface of the vitreous silica crucible; measuring a distance between the external ranging section and the outer surface as a distance from the outer surface, by subjecting the outer surface of the crucible to irradiation with laser light and then detecting a reflected light from the outer surface, the laser light being emitted from the external ranging section in an oblique direction with respect to the outer surface, and the measurement being conducted at a plurality of measuring points along a course of a movement of the external ranging section; obtaining a three-dimensional shape of the outer surface of the crucible, by associating three-dimensional coordinates of each of the measuring points with the distance from the outer surface; and evaluating the crucible based on whether a shape of the crucible determined from the three-dimensional shape of the inner surface and the three-dimensional shape of the outer surface is within a shape of a crucible having minimum thickness satisfying a dimension tolerance and a shape of a crucible having maximum thickness satisfying the dimension tolerance. moving an internal ranging section along an inner surface of the vitreous silica crucible in a contactless manner; measuring a distance between the internal ranging section and the inner surface as a distance from the inner surface, by subjecting the inner surface of the crucible to irradiation with laser light and then detecting a reflected light from the inner surface, the laser light being emitted from the internal ranging section in an oblique direction with respect to the inner surface, and the measurement being conducted at a plurality of measuring points along a course of a movement of the internal ranging section; obtaining a three-dimensional shape of the inner surface of the crucible, by associating three-dimensional coordinates of each of the measuring points with the distance from the inner surface moving an external ranging section along an outer surface of the vitreous silica crucible; measuring a distance between the external ranging section and the outer surface as a distance from the outer surface, by subjecting the outer surface of the crucible to irradiation with laser light and then detecting a reflected light from the outer surface, the laser light being emitted from the external ranging section in an oblique direction with respect to the outer surface, and the measurement being conducted at a plurality of measuring points along a course of a movement of the external ranging section; obtaining a three-dimensional shape of the outer surface of the crucible, by associating three-dimensional coordinates of each of the measuring points with the distance from the outer surface; and evaluating the crucible based on whether a shape of the crucible determined from the three-dimensional shape of the inner surface and the three-dimensional shape of the outer surface is within a shape of a crucible having minimum thickness satisfying a dimension tolerance and a shape of a crucible having maximum thickness satisfying the dimension tolerance.