A lens array of an embodiment comprises: a plurality of lenses arranged along an optical axis direction between an object and an image forming plane; a first spacer placed among the plurality of lenses; and an elastic member placed between the lower surface of the first spacer and an upper surface of at least one lens between first and second lenses, which have different widths, face the lower surface of the first spacer, and are arranged side by side along the optical axis direction among the plurality of lenses.