A construction machine comprising: a body; a swing post which is attached to the body and which can swing a left/right direction; a working device which is attached to the swing post and which includes a plurality of hydraulic cylinders (5a, 6a, 7a) and a boom; a counterweight which is disposed in a rear part of the body to secure weight balance with the working device; and a hydraulic hose which extend upwards between a pair of opposite side plates (3a and 3b) of the swing post and through which pressure oil for driving the hydraulic cylinder (5a, 6a, 7a) of the working device is guided, and which includes a first expansion section that is an upper side of the hydraulic hose and expands toward a structure disposed in a position on a front face of the body and a second expansion section that is a lower side of the hydraulic hose and expands toward a specified hydraulic cylinder among the plurality of hydraulic cylinders which has one end connected to the swing post, characterized in that a guide plate is provided on the swing post between the structure and a portion where the boom is connected to the swing post, wherein the guide plate includes a flat plate portion attached to the swing post and an inclined plate portion, the inclined plate portion being provided to stand on the flat plate portion and having a face part disposed to face the first expansion section of the hydraulic hose, the face part being formed to approach the structure as it goes upwards, the hydraulic hose is arranged between the guide plate and the portion where the boom is connected to the swing post, and the guide plate guides the hydraulic hose downwards by the inclined plate portion while restricting the hydraulic hose from moving to approach the structure disposed in the position on the front face of the body when the first expansion section of the hydraulic hose attempts to expand toward the structure due to driving of the working device. a body; a swing post which is attached to the body and which can swing a left/right direction; a working device which is attached to the swing post and which includes a plurality of hydraulic cylinders (5a, 6a, 7a) and a boom; a counterweight which is disposed in a rear part of the body to secure weight balance with the working device; and a hydraulic hose which extend upwards between a pair of opposite side plates (3a and 3b) of the swing post and through which pressure oil for driving the hydraulic cylinder (5a, 6a, 7a) of the working device is guided, and which includes a first expansion section that is an upper side of the hydraulic hose and expands toward a structure disposed in a position on a front face of the body and a second expansion section that is a lower side of the hydraulic hose and expands toward a specified hydraulic cylinder among the plurality of hydraulic cylinders which has one end connected to the swing post, characterized in that a guide plate is provided on the swing post between the structure and a portion where the boom is connected to the swing post, wherein the guide plate includes a flat plate portion attached to the swing post and an inclined plate portion, the inclined plate portion being provided to stand on the flat plate portion and having a face part disposed to face the first expansion section of the hydraulic hose, the face part being formed to approach the structure as it goes upwards, the hydraulic hose is arranged between the guide plate and the portion where the boom is connected to the swing post, and the guide plate guides the hydraulic hose downwards by the inclined plate portion while restricting the hydraulic hose from moving to approach the structure disposed in the position on the front face of the body when the first expansion section of the hydraulic hose attempts to expand toward the structure due to driving of the working device.