A method for manufacturing a lens module in which a plurality of lenses are held in a state where an optical axis of each lens is aligned, comprising: superimposing a plurality of lens arrays, each of which has a corresponding two-dimensional arrangement of lens portions and a substrate portion integrally connecting the plurality of lens portions, on each other at predetermined intervals, and aligning optical axes of the lens portions of the superimposed lens arrays to constitute a lens array laminated body; cutting the substrate portions of the other lens arrays of the plurality of superimposed lens arrays except the lowermost lens array in a superimposing direction by a first cutting portion, thereby forming a gap between cut surfaces of the cut substrate portion supplying thermosetting resins from the gap between cut surfaces so as to fill a space between the substrate portions of the superimposed lens arrays with the thermosetting resins and to cause the thermosetting resins to integrally cover the cut surfaces of the substrate portion and a surface of the substrate portion of the uppermost lens array in the superimposing direction of the plurality of superimposed lens arrays; curing the thermosetting resins by supplying heat; and separating an individual lens module by cutting the cured thermosetting resin and the substrate portion of the lowermost lens array using a second cutting portion wherein the plurality of superimposed lens arrays are adhered to each other by an adhering portion when the plurality of lens arrays are superimposed on each other, and wherein the adhering portion is formed at a periphery of the lens portion, and thereby the lens portion is partitioned from the thermosetting resins to be supplied. superimposing a plurality of lens arrays, each of which has a corresponding two-dimensional arrangement of lens portions and a substrate portion integrally connecting the plurality of lens portions, on each other at predetermined intervals, and aligning optical axes of the lens portions of the superimposed lens arrays to constitute a lens array laminated body; cutting the substrate portions of the other lens arrays of the plurality of superimposed lens arrays except the lowermost lens array in a superimposing direction by a first cutting portion, thereby forming a gap between cut surfaces of the cut substrate portion supplying thermosetting resins from the gap between cut surfaces so as to fill a space between the substrate portions of the superimposed lens arrays with the thermosetting resins and to cause the thermosetting resins to integrally cover the cut surfaces of the substrate portion and a surface of the substrate portion of the uppermost lens array in the superimposing direction of the plurality of superimposed lens arrays; curing the thermosetting resins by supplying heat; and separating an individual lens module by cutting the cured thermosetting resin and the substrate portion of the lowermost lens array using a second cutting portion wherein the plurality of superimposed lens arrays are adhered to each other by an adhering portion when the plurality of lens arrays are superimposed on each other, and wherein the adhering portion is formed at a periphery of the lens portion, and thereby the lens portion is partitioned from the thermosetting resins to be supplied.