To provide a vehicle trunk structure that supports a deck board at the same height even when either a standard tire or a spare tire is accommodated.

The trunk includes a deck box 30 on which the spare tire 20 stored in the trunk 13 is placed, and the deck board 50 to be placed on the deck box 30. The deck box 30 has the first box 31 and the second box 41. The first box 31 and the second box 41 are configured to reduce the height of the deck box 30 by a difference between the width Z4 of the tire standard tire 25 and the tire width Z3 of the spare tire 20 than a value obtained by adding the height Z1 of the first box 31 to the height Z2 of the second box 41, by accommodating at least a part of the second box 41 in the storage 32 of the first box 31.