A paper straw comprising: an inner paper part comprising a single paper strip that does not have a thermal adhesive coating material on an inner surface and is spirally wound to form one layer; and an outer paper part comprising at least one paper strip forming at least one layer by wrapping an outer peripheral surface of the inner paper part while spirally wound, an outer surface of the paper strip forming an outermost layer being provided with a thermal adhesive coating material, wherein the outer paper part comprises: a middle paper strip having a width greater than a width of the inner paper strip and wrapping an outer peripheral surface of the inner paper part; and an outer paper strip having a width greater than the width of the middle paper strip and wrapping an outer peripheral surface of the middle paper strip, the paper strip of the inner paper part is wound so as not to overlap itself, the middle paper strip is wound at least partially overlapping itself and the outer paper strip is wound at least partially overlapping itself, a thermal adhesive coating material is provided between two paper strips of adjacent different layers, and the thermal adhesive coating materials have adhesion or water resistance by heating and curing. an inner paper part comprising a single paper strip that does not have a thermal adhesive coating material on an inner surface and is spirally wound to form one layer; and an outer paper part comprising at least one paper strip forming at least one layer by wrapping an outer peripheral surface of the inner paper part while spirally wound, an outer surface of the paper strip forming an outermost layer being provided with a thermal adhesive coating material, wherein the outer paper part comprises: a middle paper strip having a width greater than a width of the inner paper strip and wrapping an outer peripheral surface of the inner paper part; and an outer paper strip having a width greater than the width of the middle paper strip and wrapping an outer peripheral surface of the middle paper strip, the paper strip of the inner paper part is wound so as not to overlap itself, the middle paper strip is wound at least partially overlapping itself and the outer paper strip is wound at least partially overlapping itself, a thermal adhesive coating material is provided between two paper strips of adjacent different layers, and the thermal adhesive coating materials have adhesion or water resistance by heating and curing. a middle paper strip having a width greater than a width of the inner paper strip and wrapping an outer peripheral surface of the inner paper part; and an outer paper strip having a width greater than the width of the middle paper strip and wrapping an outer peripheral surface of the middle paper strip, the paper strip of the inner paper part is wound so as not to overlap itself, the middle paper strip is wound at least partially overlapping itself and the outer paper strip is wound at least partially overlapping itself, a thermal adhesive coating material is provided between two paper strips of adjacent different layers, and the thermal adhesive coating materials have adhesion or water resistance by heating and curing.