A heat exchanger comprising: a plate-shaped fin being elongate in a longitudinal direction thereof; a plurality of heat transfer tubes passing through the fin; and a distributor configured to distribute refrigerant to, from among the plurality of heat transfer tubes, two of the heat transfer tubes, the distributor including an inflow portion being linear and connected to one of the heat transfer tubes, a turn-back portion continuous with the inflow portion, a first outflow portion being linear, continuous with the turn-back portion and running in parallel to the inflow portion, a second outflow portion being linear, continuous with the first outflow portion and branching from the first outflow portion, and a connection pipe continuous with the second outflow portion and including a plurality of bent portions (55e-1, 55e-2, 55e-3), characterised in that the second outflow portion is connected via the connection pipe to an other one of the heat transfer tubes not adjacent to the one of the heat transfer tubes connected to the first outflow portion, wherein, in the distributor, a virtual straight line (c) connecting axial centers at two ends of the second outflow portion is orthogonal to a virtual straight line (b) connecting axial centers at two ends of the first outflow portion, and in a side view of the turn-back portion, the virtual straight line (c) connecting the axial centers at the two ends of the second outflow portion and a virtual straight line connecting axial centers at two ends of the turn-back portion form an angle θ, wherein a possible range of the angle θ is 0 < θ < 90°, and wherein the heat exchanger is constituted by a plurality of heat exchanging units (5-1, 5-2, 5-3) isolated from each other in the longitudinal direction of the fin, and wherein the distributor is configured to distribute refrigerant to the heat exchanging units (5-1, 5-2, 5-3) different from each other. a plate-shaped fin being elongate in a longitudinal direction thereof; a plurality of heat transfer tubes passing through the fin; and a distributor configured to distribute refrigerant to, from among the plurality of heat transfer tubes, two of the heat transfer tubes, the distributor including an inflow portion being linear and connected to one of the heat transfer tubes, a turn-back portion continuous with the inflow portion, a first outflow portion being linear, continuous with the turn-back portion and running in parallel to the inflow portion, a second outflow portion being linear, continuous with the first outflow portion and branching from the first outflow portion, and a connection pipe continuous with the second outflow portion and including a plurality of bent portions (55e-1, 55e-2, 55e-3), an inflow portion being linear and connected to one of the heat transfer tubes, a turn-back portion continuous with the inflow portion, a first outflow portion being linear, continuous with the turn-back portion and running in parallel to the inflow portion, a second outflow portion being linear, continuous with the first outflow portion and branching from the first outflow portion, and a connection pipe continuous with the second outflow portion and including a plurality of bent portions (55e-1, 55e-2, 55e-3), characterised in that the second outflow portion is connected via the connection pipe to an other one of the heat transfer tubes not adjacent to the one of the heat transfer tubes connected to the first outflow portion, wherein, in the distributor, a virtual straight line (c) connecting axial centers at two ends of the second outflow portion is orthogonal to a virtual straight line (b) connecting axial centers at two ends of the first outflow portion, and in a side view of the turn-back portion, the virtual straight line (c) connecting the axial centers at the two ends of the second outflow portion and a virtual straight line connecting axial centers at two ends of the turn-back portion form an angle θ, wherein a possible range of the angle θ is 0 < θ < 90°, and wherein the heat exchanger is constituted by a plurality of heat exchanging units (5-1, 5-2, 5-3) isolated from each other in the longitudinal direction of the fin, and wherein the distributor is configured to distribute refrigerant to the heat exchanging units (5-1, 5-2, 5-3) different from each other.