A stocker in a reel supply apparatus can support and deliver various kinds of reels having different outer peripheral diameters. It has a housing mounted on a reversely revolvable cylindrical body. At the both sides of the housing, reel supporting frames are provided in such a manner as to extend toward the opposite directions. Within the reel supporting frame structures, revolvable threaded shafts are disposed. Pushers are engaged with the revolvable threaded shafts in order to move along the supporting frame structures, respectively.