A connecting method for electrically connecting a contact having conductivity to a flexible conductor (F12, F32) exposed on one of surfaces of a connection object (F1, F3), the flexible conductor (F12, F32) including a connection part (51A, 52A, 53A, 54A, 91A, 92A) that is formed of part of the flexible conductor and situated at a predetermined position when viewed from a direction perpendicular to the connection object, wherein the connection object (F1, F3) includes a support (F11, F31) having a sheet-like shape and insulation properties, and the flexible conductor (F12, F32) disposed on one of surfaces of the support, wherein the support includes an island-like portion (21, 31, 81) that is surrounded by a pair of cuts (22, 23, 32, 33) facing each other and is provided at one surface thereof with at least one connection part, and a pair of joint portions (24, 25, 34, 35, 82, 83) that respectively join opposite ends of the island-like portion to a surrounding portion of the support, the method comprising the steps of: when the flexible conductor is exposed on a top surface of the connection object, disposing the contact on the top surface of the connection object (F1, F3) at the predetermined position in a state where the connection object is kept as it is, and when the flexible conductor is exposed on a bottom surface of the connection object, disposing the contact on the top surface of the connection object (F1, F3) at the predetermined position in a state where a part of the connection object (F1, F3) where the connection part (51A, 52A, 53A, 54A, 91A, 92A) is disposed is inverted such that the connection part faces a top surface side of the connection object while being retained at the predetermined position, wherein when the pair of joint portions are deformed, the island-like portion is inverted around an inversion axis (A1, A2, A5) extending along the support, and retaining the contact in a housing that is attached to the connection object and bringing the contact into contact with the connection part (51A, 52A, 53A, 54A, 91A, 92A) to electrically connect the contact to the flexible conductor (F12, F32). wherein the connection object (F1, F3) includes a support (F11, F31) having a sheet-like shape and insulation properties, and the flexible conductor (F12, F32) disposed on one of surfaces of the support, wherein the support includes an island-like portion (21, 31, 81) that is surrounded by a pair of cuts (22, 23, 32, 33) facing each other and is provided at one surface thereof with at least one connection part, and a pair of joint portions (24, 25, 34, 35, 82, 83) that respectively join opposite ends of the island-like portion to a surrounding portion of the support, the method comprising the steps of: when the flexible conductor is exposed on a top surface of the connection object, disposing the contact on the top surface of the connection object (F1, F3) at the predetermined position in a state where the connection object is kept as it is, and when the flexible conductor is exposed on a bottom surface of the connection object, disposing the contact on the top surface of the connection object (F1, F3) at the predetermined position in a state where a part of the connection object (F1, F3) where the connection part (51A, 52A, 53A, 54A, 91A, 92A) is disposed is inverted such that the connection part faces a top surface side of the connection object while being retained at the predetermined position, wherein when the pair of joint portions are deformed, the island-like portion is inverted around an inversion axis (A1, A2, A5) extending along the support, and retaining the contact in a housing that is attached to the connection object and bringing the contact into contact with the connection part (51A, 52A, 53A, 54A, 91A, 92A) to electrically connect the contact to the flexible conductor (F12, F32). when the flexible conductor is exposed on a top surface of the connection object, disposing the contact on the top surface of the connection object (F1, F3) at the predetermined position in a state where the connection object is kept as it is, and when the flexible conductor is exposed on a bottom surface of the connection object, disposing the contact on the top surface of the connection object (F1, F3) at the predetermined position in a state where a part of the connection object (F1, F3) where the connection part (51A, 52A, 53A, 54A, 91A, 92A) is disposed is inverted such that the connection part faces a top surface side of the connection object while being retained at the predetermined position, wherein when the pair of joint portions are deformed, the island-like portion is inverted around an inversion axis (A1, A2, A5) extending along the support, and retaining the contact in a housing that is attached to the connection object and bringing the contact into contact with the connection part (51A, 52A, 53A, 54A, 91A, 92A) to electrically connect the contact to the flexible conductor (F12, F32).