An air conditioner comprising: a compressor (111, 211) configured to compress a refrigerant; a refrigeration cycle component (112, 121, 212) configured to form a part of a refrigeration cycle together with the compressor (111, 211), the refrigeration cycle component (112, 121) being installed at at least one of an upstream side and a downstream side of the compressor (111, 211) to allow flow of the refrigerant to supply the refrigerant to the compressor (111, 211) or be supplied with the refrigerant from the compressor (111, 211); and a stainless pipe (131, 134, 230, 330, 430) made of a stainless steel, the stainless pipe (131, 134, 230, 330, 430) having one end (230a, 330a, 430a) connected to the compressor (111, 211) and the other end (230b, 330b, 430b) connected to the refrigeration cycle component (112, 121), to form a single pipe between the compressor (111, 211) and the refrigeration cycle component (112, 121), the stainless pipe (131, 134, 230, 330, 430) partially having a corrugated part (230e, 330e, 430e) to attenuate vibration transferred from the compressor (111, 211) to the refrigeration cycle component (112, 121), wherein the corrugated part (230e, 330e, 430e) is formed by processing at least a portion of the stainless pipe (131, 134, 230, 330, 430) such that ridges (230e1) and valleys (230e2) are alternately disposed, characterized in that the at least a portion of the stainless pipe (131, 134, 230, 330, 430) is integrally formed with a remaining portion of the stainless pipe (131, 134, 230, 330, 430), a thickness of the stainless pipe (131, 134, 230, 330, 430) at the ridge (230e1), a thickness of the stainless pipe (131, 134, 230, 330, 430) at the valley (230e2), and a thickness of the stainless pipe (131, 134, 230, 330, 430) between the ridge (230e1) and the valley (230e2) have differences of exceeding 0 to 2% or less, and the thicknesses (T1, T2, T3) and a thickness of the stainless pipe (131, 134, 230, 330, 430) in the region in which the corrugated part (230e, 330e, 430e) does not exist have thickness differences of exceeding 0 to 5% or less. a compressor (111, 211) configured to compress a refrigerant; a refrigeration cycle component (112, 121, 212) configured to form a part of a refrigeration cycle together with the compressor (111, 211), the refrigeration cycle component (112, 121) being installed at at least one of an upstream side and a downstream side of the compressor (111, 211) to allow flow of the refrigerant to supply the refrigerant to the compressor (111, 211) or be supplied with the refrigerant from the compressor (111, 211); and a stainless pipe (131, 134, 230, 330, 430) made of a stainless steel, the stainless pipe (131, 134, 230, 330, 430) having one end (230a, 330a, 430a) connected to the compressor (111, 211) and the other end (230b, 330b, 430b) connected to the refrigeration cycle component (112, 121), to form a single pipe between the compressor (111, 211) and the refrigeration cycle component (112, 121), the stainless pipe (131, 134, 230, 330, 430) partially having a corrugated part (230e, 330e, 430e) to attenuate vibration transferred from the compressor (111, 211) to the refrigeration cycle component (112, 121), wherein the corrugated part (230e, 330e, 430e) is formed by processing at least a portion of the stainless pipe (131, 134, 230, 330, 430) such that ridges (230e1) and valleys (230e2) are alternately disposed, characterized in that the at least a portion of the stainless pipe (131, 134, 230, 330, 430) is integrally formed with a remaining portion of the stainless pipe (131, 134, 230, 330, 430), a thickness of the stainless pipe (131, 134, 230, 330, 430) at the ridge (230e1), a thickness of the stainless pipe (131, 134, 230, 330, 430) at the valley (230e2), and a thickness of the stainless pipe (131, 134, 230, 330, 430) between the ridge (230e1) and the valley (230e2) have differences of exceeding 0 to 2% or less, and the thicknesses (T1, T2, T3) and a thickness of the stainless pipe (131, 134, 230, 330, 430) in the region in which the corrugated part (230e, 330e, 430e) does not exist have thickness differences of exceeding 0 to 5% or less.