An apparatus (100, 200) for measuring a bending tensile strength of an electrode sample for manufacturing of a winding-type electrode assembly, wherein the sample comprises a first end part and a second end part, the apparatus (100, 200) comprising a jig assembly (185, 285) comprising: a fixing unit (150, 250) which is configured to fix the first end part of the sample and a bending jig (120, 120') configured to cause, when the apparatus is in use, a one point bend on a lenghtwise direction cross section of the sample having the first end part fixed to the fixing unit (150, 250) and configured to guide the second end part (1 10b) of the sample toward a tensile testing load unit; wherein the bending jig (120, 120') has a flat rectangular parallelepiped plate shape with a long and narrow side, wherein, when the apparatus (100, 200) is in use, the bending jig (120, 120') is being disposed with the long and narrow side facing down and the long and narrow side is forming a bottom face, and wherein the bottom face is a part that causes the one point bend to the sample and has a front end part, wherein the cross section of the front end part has a semi-circular shape with a radius of 0.25 to 0.5 mm, wherein the jig assembly further comprises a support which fixes the bending jig at two ends of the bending jig, wherein the fixing unit comprises a base on which the first end part of the sample is placed such that the first end part of the sample is disposed higher than the bottom face of the bending jig and a fixing place which fixes first end part of the sample to the base; wherein the jig assembly further comprises a bottom plate which is a basis having the support and the base, and a tensile strength measuring device which is connectable to the second end part of the sample, the sample set to pass through the bottom face of the bending jig of the jig assembly, the tensible strength measuring device comprising the tensile testing load unit provided in vertical direction for subjecting, when the apparatus is in use, the second end part of the sample to a force pulled in the vertical direction, in order to measure the tensile strength while bending the sample. a fixing unit (150, 250) which is configured to fix the first end part of the sample and a bending jig (120, 120') configured to cause, when the apparatus is in use, a one point bend on a lenghtwise direction cross section of the sample having the first end part fixed to the fixing unit (150, 250) and configured to guide the second end part (1 10b) of the sample toward a tensile testing load unit; wherein the bending jig (120, 120') has a flat rectangular parallelepiped plate shape with a long and narrow side, wherein, when the apparatus (100, 200) is in use, the bending jig (120, 120') is being disposed with the long and narrow side facing down and the long and narrow side is forming a bottom face, and wherein the bottom face is a part that causes the one point bend to the sample and has a front end part, wherein the cross section of the front end part has a semi-circular shape with a radius of 0.25 to 0.5 mm, wherein the jig assembly further comprises a support which fixes the bending jig at two ends of the bending jig, wherein the fixing unit comprises a base on which the first end part of the sample is placed such that the first end part of the sample is disposed higher than the bottom face of the bending jig and a fixing place which fixes first end part of the sample to the base; wherein the jig assembly further comprises a bottom plate which is a basis having the support and the base, and a tensile strength measuring device which is connectable to the second end part of the sample, the sample set to pass through the bottom face of the bending jig of the jig assembly, the tensible strength measuring device comprising the tensile testing load unit provided in vertical direction for subjecting, when the apparatus is in use, the second end part of the sample to a force pulled in the vertical direction, in order to measure the tensile strength while bending the sample.