To provide an on-vehicle device 48 for transportation capable of loading/unloading an unmanned helicopter 1 at a stable attitude by one worker.

A cart 20 for transporting the unmanned helicopter 1 provided with runners 9 on right and left sides of a lower part of a machine body has: a support vehicle body 21 with a pair of right and left wheels 22; a handle frame 23 provided extendingly from the support vehicle body 21; a gripping part 24 provided on a distal end of the handle frame; a runner receiving part 25 provided on the support vehicle body 21 and supporting the right and left runners 9; and locking means 26 for fixing a rear skid 12 of a rear part of the machine body of the unmanned helicopter 1. The on-vehicle device 48 for transportation has an attachable/detachable ladder rail 49 for performing loading/unloading relative to a load-carrying platform 47; and a cart base frame 50 capable of placing the cart 20 fixed to the load-carrying platform 47 and mounted with the unmanned helicopter. The cart base frame 50 has a wheel support rail 57 capable of setting the pair of right and left wheels 22 at a predetermined position.