Mounted on a revolving frame (4) are onboard equipments including engine (14) and heat exchanger (16). These onboard equipments are accommodated in a housing cover (21) consisted by including a front partition panel (24). The front partition panel (24) is fixed to a seat screw member (20) which is provided on the revolving frame (4). At this time, lower end portion (24F) of the front partition panel (24) is hung in a floated state above the revolving frame (4) by a stopper (28) which is adapted rest on an upper end portion (20C) of the seat screw member (20). Therefore, lower end portion (24F) of the front partition panel (24) is hung in a floated state above a upper surface (11A) of a left side frame (11), facilitating to align a bolt through hole (26) in the front partition panel (24) with a nut (20B) of the seat screw member (20) at the time of threading and tightening a bolt (27) into the nut (20B).
