A refrigerant flow divider (70) is provided with: a cylindrical flow divider body (71) which extends along the longitudinal direction of a header collecting pipe (80), and is formed with a plurality of communication holes (130) arranged in the longitudinal direction; and a coupling member (100) which extends in the longitudinal direction of the header collecting pipe (80) and the flow divider body (71), and has a first member (110) and a second member (120) overlapping each other. The coupling member (100) is configured so that the first member (110) and the second member (120) in overlapping relation with each other form a plurality of flow dividing pipes (101) which each connect a corresponding pair of communication holes (130, 140) of the header collecting pipe (80) and the flow divider body (71).
