Abstract: An engine cooling air passage for construction equipment, which is capable of reducing noise released from a cooling air exhaust port with back pressure of cooling air remaining low and making an engine room compact, is provided. To this end, in the engine cooling passage, a fan air diversion passage (53) of a predetermined length, which has a fan air diversion opening (53a) located near an outer periphery portion of a cooling fan (16) and taking in a cooling air blown by the cooling fan (16), at one end side, and an opening (53b) located near a lateral end portion of a counterweight (61) and discharging the cooling air taken in to an outside, at the other end side, is formed either in a front portion of or in front of the counterweight (61).