A working machine comprising: a lower propelling body; a support base supported by the lower propelling body; an equipment installation area provided on the support base to allow equipment to be installed therein; a pipe extending from the equipment installation area; a guard which covers the equipment installation area and has an opening for leading out the pipe therethrough; and a clamp configured to support the pipe and having a shape capable of closing up the opening, the clamp including: a plurality of support elements for supporting the pipe; a guide portion for guiding the plurality of support elements so as to allow the plurality of support elements to be arranged side-by-side in a row along a specific direction; and a pair of clamping members (61, 62) for clamping the plurality of support elements from respective opposite sides in the specific direction, wherein one of the pair of clamping members (61, 62) has a shield plate portion having a shape capable of closing up a remaining region of the opening other than a region closed up by the plurality of support elements arranged under a condition that the number thereof is set within a specific value, wherein the working machine further comprises: a vertical plate provided on the support base to stand vertically upwardly; and an attachment supported by the vertical plate raisably and lowerably with respect to the support base, wherein the pipe includes a hydraulic hose adapted to be supported by the plurality of support elements and to send hydraulic oil to the attachment therethrough; characterized in that the remaining one of the pair of clamping members (61, 62) is fixed to the vertical plate. a lower propelling body; a support base supported by the lower propelling body; an equipment installation area provided on the support base to allow equipment to be installed therein; a pipe extending from the equipment installation area; a guard which covers the equipment installation area and has an opening for leading out the pipe therethrough; and a clamp configured to support the pipe and having a shape capable of closing up the opening, the clamp including: a plurality of support elements for supporting the pipe; a guide portion for guiding the plurality of support elements so as to allow the plurality of support elements to be arranged side-by-side in a row along a specific direction; and a pair of clamping members (61, 62) for clamping the plurality of support elements from respective opposite sides in the specific direction, a plurality of support elements for supporting the pipe; a guide portion for guiding the plurality of support elements so as to allow the plurality of support elements to be arranged side-by-side in a row along a specific direction; and a pair of clamping members (61, 62) for clamping the plurality of support elements from respective opposite sides in the specific direction, wherein one of the pair of clamping members (61, 62) has a shield plate portion having a shape capable of closing up a remaining region of the opening other than a region closed up by the plurality of support elements arranged under a condition that the number thereof is set within a specific value, wherein the working machine further comprises: a vertical plate provided on the support base to stand vertically upwardly; and an attachment supported by the vertical plate raisably and lowerably with respect to the support base, wherein the pipe includes a hydraulic hose adapted to be supported by the plurality of support elements and to send hydraulic oil to the attachment therethrough; characterized in that the remaining one of the pair of clamping members (61, 62) is fixed to the vertical plate. a vertical plate provided on the support base to stand vertically upwardly; and an attachment supported by the vertical plate raisably and lowerably with respect to the support base, wherein the pipe includes a hydraulic hose adapted to be supported by the plurality of support elements and to send hydraulic oil to the attachment therethrough; characterized in that the remaining one of the pair of clamping members (61, 62) is fixed to the vertical plate.