A working vehicle comprising: a vehicle body; an obstacle detector to detect an obstacle in the vicinity of the vehicle body; at least one lamp (80, 81) to be lighted on a peripheral portion of the vehicle body; and an attachment bracket attached to the vehicle body, wherein the attachment bracket includes an attachment body including a detector-attaching portion to which the obstacle detector is attached, and at least one lamp-attaching portion (88, 89) to which the at least one lamp (80, 81) is attached, the at least one lamp (80, 81) includes a combination lamp including a plurality of signalling lamps combined with each other, and a work lamp to illuminate the vicinity of the vehicle body, and the at least one lamp-attaching portion (88, 89) includes a first lamp-attaching portion to which the combination lamp is attached, and a second lamp-attaching portion to which the work lamp is attached, the working vehicle being characterized in that the detector-attaching portion is provided at a vehicle-width directional outward portion of the attachment body so as to enable the obstacle detector attached to the detector-attaching portion to detect an obstacle outward in the vehicle-width direction from the vehicle body, the first lamp-attaching portion is provided at a front portion of the attachment body, the work lamp includes a headlamp to illuminate forward from the vehicle body, and a sidelamp to illuminate outward in the vehicle-width direction from the vehicle body, and the second lamp-attaching portion includes an upper attaching portion, to which one of the headlamp and the sidelamp is attached, provided at an upper portion of the attachment body, and a lower attaching portion, to which the other of the headlamp and the sidelamp is attached, provided at a lower portion of the attachment body. a vehicle body; an obstacle detector to detect an obstacle in the vicinity of the vehicle body; at least one lamp (80, 81) to be lighted on a peripheral portion of the vehicle body; and an attachment bracket attached to the vehicle body, wherein the attachment bracket includes an attachment body including a detector-attaching portion to which the obstacle detector is attached, and at least one lamp-attaching portion (88, 89) to which the at least one lamp (80, 81) is attached, a detector-attaching portion to which the obstacle detector is attached, and at least one lamp-attaching portion (88, 89) to which the at least one lamp (80, 81) is attached, the at least one lamp (80, 81) includes a combination lamp including a plurality of signalling lamps combined with each other, and a work lamp to illuminate the vicinity of the vehicle body, and the at least one lamp-attaching portion (88, 89) includes a first lamp-attaching portion to which the combination lamp is attached, and a second lamp-attaching portion to which the work lamp is attached, a combination lamp including a plurality of signalling lamps combined with each other, and a work lamp to illuminate the vicinity of the vehicle body, and the at least one lamp-attaching portion (88, 89) includes a first lamp-attaching portion to which the combination lamp is attached, and a second lamp-attaching portion to which the work lamp is attached, the working vehicle being characterized in that the detector-attaching portion is provided at a vehicle-width directional outward portion of the attachment body so as to enable the obstacle detector attached to the detector-attaching portion to detect an obstacle outward in the vehicle-width direction from the vehicle body, the first lamp-attaching portion is provided at a front portion of the attachment body, the work lamp includes a headlamp to illuminate forward from the vehicle body, and a sidelamp to illuminate outward in the vehicle-width direction from the vehicle body, and a headlamp to illuminate forward from the vehicle body, and a sidelamp to illuminate outward in the vehicle-width direction from the vehicle body, and the second lamp-attaching portion includes an upper attaching portion, to which one of the headlamp and the sidelamp is attached, provided at an upper portion of the attachment body, and a lower attaching portion, to which the other of the headlamp and the sidelamp is attached, provided at a lower portion of the attachment body.