A compressor including a housing assembly that includes a bearing housing and a compressor housing, and a movable vane. In the housing assembly, a diffuser is formed by a first diffuser wall portion and a second diffuser wall portion. The movable vane includes a base portion and vane portions. The movable vane is movable between a projected position where a facing surface of the base portion contacts with a positioning surface provided in a storage chamber and a retracted position. The compressor housing includes an affixing portion projecting further than the second diffuser wall portion, and a fastening surface being, provided, to the affixing portion. The compressor housing is assembled with the bearing housing by attaching the fastening surface to a mounting surface of the bearing housing. The positioning surface is provided in the storage chamber so as to be flush with the fastening surface.