Abstract: A propeller fan comprising a pair of similar sheet metal spider-blade members each having a flat central hub section and two right angularly arranged pairs of narrow radially outwardly projecting spider arms. Each spider arm is twisted at an intermediate portion so that radially outer end portions of the arms of each pair are inclined in opposite directions relative to the hub section. A pair of air moving blades are formed integrally at inner end portions respectively with the outer end portions of the spider arms of one of the pairs of arms. A pair of laterally projecting blade support members are integrally formed respectively with the outer end portions of the other pair of spider arms. Each blade support member is approximately twice as wide as each spider arm and each blade is approximately four times as wide as each spider arm. The width and length of each blade are approximately equal.