A rod having a bamboo structure which is formed of a Cu-Al-Mn-based superelastic alloy material having a composition consisting of 3.0 to 10.0 mass% of Al, 5.0 to 20.0 mass% of Mn, and 0.000 to 10.000 mass% in total of at least one selected from the group consisting of Ni, Co, Fe, Ti, V, Cr, Si, Nb, Mo, W, Sn, Mg, P, Be, Sb, Cd, As, Zr, Zn, B, C, Ag, and misch metal, where the contents of Ni and Fe are each 0.000 to 3.000 mass%; the content of Co is 0.000 to 2.000 mass%; the content of Ti is 0.000 to 2.000 mass%; the contents of V, Nb, Mo, and Zr are each 0.000 to 1.000 mass%; the content of Cr is 0.000 to 2.000 mass%; the content of Si is 0.000 to 2.000 mass%; the content of W is 0.000 to 1.000 mass%; the content of Sn is 0.000 to 1.000 mass%; the content of Mg is 0.000 to 0.500 mass%; the content of P is 0.000 to 0.500 mass%; the contents of Be, Sb, Cd, and As are each 0.000 to 1.000 mass%; the content of Zn is 0.000 to 5.000 mass%; the contents of B and C are each 0.000 to 0.500 mass%; the content of Ag is 0.000 to 2.000 mass%; and the content of misch metal is 0.000 to 5.000 mass%; with the balance being Cu and unavoidable impurities, wherein the alloy material is an alloy material having a shape that is elongated in the working direction, which is the drawing direction, wherein the Cu-Al-Mn-based alloy material has a recrystallized texture wherein the proportion occupied by a β phase in the recrystallization texture is 90% or more, wherein in regard to a grain X for which the grain length a x in the working direction of the alloy material is R/2 or less with respect to the width or diameter R of the alloy material, and for which the grain length b x in a direction perpendicular to the working direction is R/4 or less, the amount of existence of the grains X is 15% or less of the total amount of the alloy material, and wherein in regard to a grain Y', for which the grain length a in the working direction and the grain length b in the direction perpendicular to the working direction satisfy the relationships of a ≥ b, and for which the angle formed by the normal line of the plane of the crystal and the working direction is 15° or larger, the amount of existence of the grains Y' is 85% or more of the total amount of the alloy material, wherein the value of the difference between the stress value of 0.2% proof stress in the case of performing loading and unloading of stress that gives a strain of 5%, and the stress value obtainable when a strain of 5% is loaded, as determined from a stress-strain curve, is 50 MPa or less, and the amount of residual strain obtainable when loading and unloading of the stress that gives a strain of 5% is repeated 100 times, is 2.0% or less, wherein the crystalline orientation is analyzed at a plane that faces the working direction by electron backscatter diffraction pattern analysis (EBSP), wherein among the grains Y', in regard to a grain Z' in which the angle formed by the normal line of the plane of the crystal and the working direction is 20° or less, the amount of existence of the grains Z' is 50% or more of the total amount of the alloy material, wherein the term "bamboo structure" refers to a metallic texture having a crystal structure in which the grain boundaries of the grains Y' and Z' are positioned like the nodes of a bamboo tree, and wherein grains X are co-present in the bamboo structure formed by grains Y' or Z'. <EOS>