A storage structure for convertible hardtop for effectively using a stored roof while no excessively large rear trunk is necessary. The storage structure is provided for storing a roof and a rear pillar of a convertible hardtop vehicle which has plural row forward-facing seats, in which the roof is substantially horizontally stored from the back side of a backrest of the most front seat in a manner such that the roof bestrides a parting line between the rear pillar and a trunk lid of the vehicle, and the rear pillar is stored under the roof.