A vehicle body upper structure includes a roof support portion constituting a skeleton of an outer peripheral portion of a vehicle body upper portion and a roof which is made of resin, and which supported by the roof support portion. The roof has a bonded portion on a lower surface of the outer peripheral portion of the roof and the bonded portion is joined to an upper surface of the roof support portion via an adhesive. The roof has an extending portion on a lower surface side of a part of the outer peripheral portion of the roof, and the part is closer to a terminal side than the bonded portion and the extending portion extends downwards in a vehicle-height direction.