To provide a refrigerant container fixing device of compressor piping capable of easily positioning and fixing a refrigerant container, and achieving vibration absorbing support.

A compressor 6 and an accumulator 7 are arranged on a bottom plate 1 of an air conditioner outdoor unit. The accumulator 7 is fixed on a mounting plate 10 vertically fixed on the bottom plate 1. The mounting plate 10 has a first surface 12 and a second surface 13, and the accumulator 7 is in contact with the first surface 12 and the second surface 13 at two points of an outer circumferential surface. The accumulator 7 is fastened and fixed on the mounting plate 10 by a fixing band 20 with the first surface 12 as a fixing point on one end and the second surface 13 as a fixing point on other end. The fixing band 20 is attached by engaging folding parts 21 on both ends with an opening 14 of the first surface 12 and an opening 15 of the second surface 13. A vibration absorbing member 30 is sandwiched between the accumulator 7 and the fixing band 20.