A fin tube heat exchanger includes a plurality of plate-shaped elongated fin members (110) spaced at regular intervals in parallel with one another. Each fin member has a fin base, a plurality of through-holes (112) in two rows in a longitudinal direction of the fin member and a plurality of raised portions with legs. A plurality of heat exchanger tubes inserted into the through-holes. Each fin member has flat areas at a front and middle regions of a front half and a middle region of a rear half. The raised portion disposed at a rear region of the front half and a front region of the rear half has the legs inclined by a predetermined angle with respect to a traverse centerline which passes through the center of an adjacent through-hole of the front row. The distance from the centerline is generally increased. The more volume of air can be directed toward the vicinity of the tubes of the rear row. Each fin member has a front edge and a rear edge. The front edge has protruded portions and recessed portions and the rear edge has protruded portions and recessed portions. The protruded portion of the front edge substantially corresponds to the recessed portion of the rear edge disposed on the same traverse centerline.
