An outside protection apparatus for a vehicle includes an outside airbag device. The outside airbag device includes a bag body expandable to be overlaid on an outer surface of a body of the vehicle, and an inflator configured to expand the bag body. The bag body includes an irregularity formation member at an inner surface of the bag body, and a tether coupled to the irregularity formation member to be bridged in an inner portion of the bag body in a state in which the bag body is expanded. The irregularity formation member forms a projection at a surface of the bag body in response to tension acting on the tether in the state in which the bag body is expanded.