Patent attributes
A housing case (16) is provided on a revolving frame (5) at a position on a front side from a fuel tank (12). The housing case (16) is constituted by including a case-fixing bracket (17) having a left leg part (18), a right leg part (19), and amounting platform (20) across a reducing agent tank (14), a lower accommodating case (21) arranged by surrounding the case-fixing bracket (17), and an upper accommodating case (23) located on an upper side of the lower accommodating case (21). Atop surface part (21E) of the lower accommodating case (21) and a lower surface (23B) of the upper accommodating case (23) are connected to the mounting platform (20) of the case-fixing bracket (17). As a result, the lower accommodating case (21) and the upper accommodating case (23) can be firmly mounted on the revolving frame (5) through the case-fixing bracket (17).