A valve arrangement structure for a construction machine, comprising: a control valve connected to a hydraulic device via a hydraulic pipe; a solenoid valve connected to the control valve via a plurality of pilot pipes; a valve supporting member (21, 40) which supports the control valve from below the control valve; and a supporting bracket which supports the solenoid valve, wherein a hydraulic port to which the hydraulic pipe is connected is provided on a lateral connection surface (30a, 30b) of the control valve, characterized in that the solenoid valve is positioned above the control valve, and the supporting bracket includes: an erected section which is erected at a position separated from the lateral connection surface (30a, 30b) of the control valve in a horizontal direction so as not to overlap with the lateral connection surface (30a, 30b) in a viewpoint along a direction perpendicular to the lateral connection surface (30a, 30b) and which extends in a vertical direction from the valve supporting member (21, 40) to a position higher than an upper surface of the control valve; a placing section which extends from an upper end section of the erected section so as to be arranged at a position higher than the upper surface of the control valve and on which the solenoid valve is placed; and at least one guide section which is provided in the erected section, which holds the pilot pipes in a bundled state so that the pilot pipes are routed in the vertical direction along the erected section, and which restricts the pilot pipes from moving in at least a direction separating from the control valve. a control valve connected to a hydraulic device via a hydraulic pipe; a solenoid valve connected to the control valve via a plurality of pilot pipes; a valve supporting member (21, 40) which supports the control valve from below the control valve; and a supporting bracket which supports the solenoid valve, wherein a hydraulic port to which the hydraulic pipe is connected is provided on a lateral connection surface (30a, 30b) of the control valve, characterized in that the solenoid valve is positioned above the control valve, and the supporting bracket includes: an erected section which is erected at a position separated from the lateral connection surface (30a, 30b) of the control valve in a horizontal direction so as not to overlap with the lateral connection surface (30a, 30b) in a viewpoint along a direction perpendicular to the lateral connection surface (30a, 30b) and which extends in a vertical direction from the valve supporting member (21, 40) to a position higher than an upper surface of the control valve; a placing section which extends from an upper end section of the erected section so as to be arranged at a position higher than the upper surface of the control valve and on which the solenoid valve is placed; and at least one guide section which is provided in the erected section, which holds the pilot pipes in a bundled state so that the pilot pipes are routed in the vertical direction along the erected section, and which restricts the pilot pipes from moving in at least a direction separating from the control valve. an erected section which is erected at a position separated from the lateral connection surface (30a, 30b) of the control valve in a horizontal direction so as not to overlap with the lateral connection surface (30a, 30b) in a viewpoint along a direction perpendicular to the lateral connection surface (30a, 30b) and which extends in a vertical direction from the valve supporting member (21, 40) to a position higher than an upper surface of the control valve; a placing section which extends from an upper end section of the erected section so as to be arranged at a position higher than the upper surface of the control valve and on which the solenoid valve is placed; and at least one guide section which is provided in the erected section, which holds the pilot pipes in a bundled state so that the pilot pipes are routed in the vertical direction along the erected section, and which restricts the pilot pipes from moving in at least a direction separating from the control valve.