To provide an unmanned carrier easily adjusting an optical axis of a light emitting section configuring an obstacle detection means.

Light is emitted to a reflecting plate 17 for inspection, which includes multiple reflecting sections 17a to 17e arranged is stages in the transverse direction. By receiving reflected light, a reflecting that has reflect the light is identified from among the reflecting sections 17a to 17e. Then, the result is displayed on a display section 16a as optical axis adjustment information as an index to adjust the optical axis of the light emitting section. Since symbols Ha to He corresponding to the reflecting sections 17a to 17e are turned on the display section 16a, whether to adjust the optical axis and adjustment amount can be recognized from the display.

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