An arrangement of a wire harness (8, 9) and a heat generation source, the wire harness (8, 9) comprising: at least one conducting path (16, 51); and a tubular exterior member that covers the conducting path (16, 51), wherein the exterior member has a shape changed portion (23, 61) in at least one position; wherein the shape changed portion (23, 61, 71) includes: at least one small tube portion (28, 63) which includes an accommodation space (27, 62) necessary for accommodating the conducting path (16, 51); a tube continuous portion (29, 64) one end of which is continuous with an end of the small tube portion (28, 63); and a large tube portion which is continuous with another end of the tube continuous portion (29, 64) and includes a tubular shape that is larger in outer shape than the small tube portion (28, 63); and wherein the at least one small tube portion (28, 63) is formed at a range sufficient for absorbing and dissipating heat generated at the at least one conducting path (16, 51), characterized in that a formation range of the at least one small tube portion (28, 63) corresponds to a size of the heat generation source, and a distance of the at least one small tube portion (28, 63) from the heat generation source is greater than a distance of the large tube portion from the heat generation source. at least one conducting path (16, 51); and a tubular exterior member that covers the conducting path (16, 51), wherein the exterior member has a shape changed portion (23, 61) in at least one position; wherein the shape changed portion (23, 61, 71) includes: at least one small tube portion (28, 63) which includes an accommodation space (27, 62) necessary for accommodating the conducting path (16, 51); a tube continuous portion (29, 64) one end of which is continuous with an end of the small tube portion (28, 63); and a large tube portion which is continuous with another end of the tube continuous portion (29, 64) and includes a tubular shape that is larger in outer shape than the small tube portion (28, 63); and wherein the at least one small tube portion (28, 63) is formed at a range sufficient for absorbing and dissipating heat generated at the at least one conducting path (16, 51), characterized in that a formation range of the at least one small tube portion (28, 63) corresponds to a size of the heat generation source, and a distance of the at least one small tube portion (28, 63) from the heat generation source is greater than a distance of the large tube portion from the heat generation source. at least one small tube portion (28, 63) which includes an accommodation space (27, 62) necessary for accommodating the conducting path (16, 51); a tube continuous portion (29, 64) one end of which is continuous with an end of the small tube portion (28, 63); and a large tube portion which is continuous with another end of the tube continuous portion (29, 64) and includes a tubular shape that is larger in outer shape than the small tube portion (28, 63); and wherein the at least one small tube portion (28, 63) is formed at a range sufficient for absorbing and dissipating heat generated at the at least one conducting path (16, 51), characterized in that a formation range of the at least one small tube portion (28, 63) corresponds to a size of the heat generation source, and a distance of the at least one small tube portion (28, 63) from the heat generation source is greater than a distance of the large tube portion from the heat generation source.