A vehicle resin back door structure includes a back door panel made of resin, which has a first opening, and of which a marginal edge portion that forms the first opening is formed in a closed sectional shape; a bracket made of metal, which is fixed inside the closed section of the marginal edge portion, and of which a portion is exposed by a second opening formed in the marginal edge portion; and a back window glass of which a peripheral edge portion is joined to the marginal edge portion including the portion of the bracket that is exposed by the second opening.