The present invention relates to a deceleration device for a vehicle, comprising: a separation unit connected to one side of the vehicle; a parachute connected to the separation unit by a plurality of cables; a power generation unit provided on a parachute to generate electricity; And a wire for transferring the power produced by the power generation unit to the separation unit; includes, but the separation unit is configured to be separated from the aircraft by the power transmitted from the electric wire.
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