To suitably solve a two-layer separation state of a liquid refrigerant and refrigerating machine oil inside an accumulator without using hot gas in a refrigerating system using R32 as a refrigerant.

An air conditioner 10 using the R32 refrigerant includes a compressor 20, an indoor heat exchanger 50, an outdoor expansion valve 41, an outdoor heat exchanger 30, an accumulator 70 which separates a refrigerant into gas and liquid, and also stores a surplus refrigerant; a branch pipe 62; an electric operated valve 63 and a heat exchanger 64 for injection; a first injection flow path 65; and the like. The heat exchanger 64 for injection heat-exchanges between a refrigerant flowing in a main refrigerant flow path 11a, and a refrigerant which has passed the electric operated valve 63 for injection of the branch pipe 62. The first injection flow path 65 is a flow path for guiding the refrigerant which flows in the branch pipe 62, and is discharged from the heat exchanger 64 for injection into the accumulator 70, and the forefront is in a height position at only a dimension of 0-0.3 time of a height dimension of an internal space away from the bottom of the internal space of the accumulator 70.