CAB FOR A CONSTRUCTION MACHINE

A cab (7) for a construction machine includes; an operator seat (18) including a seat base (18A) and a backrest (18B); a control box (20A, 20B) disposed along a lateral side of the operator seat (18); an air conditioner main body (31) for cooling an air; and a duct (40) disposed behind the operator seat (18) for guiding a cooling air generated in the air conditioner main body (31), wherein the duct (40) has a blowing port (41, 42) provided at such a position as to allow the cooling air to flow frontward along at least one of a lateral side of the seat base (18A) and a lateral side of a lower portion (18BD) of the backrest (18B) and along an inner surface of the control box (20A, 20B).