A disposable surgical gown of back-closable type includes a basic body composed of a front body, first and second rear bodies separated from each other and a pair of sleeves. The first and second rear bodies are in advance developed in a circumferential direction and folded back onto the front body so that free side edge regions of the rear bodies lie on the outer surface of the front body. The free side edge regions are connected to each other by a tape member which has its transversely opposite side regions bonded to the respective free side edge regions at longitudinally middle zones thereof so as to extend in the circumferential direction and a perforation extending in a longitudinal direction between the opposite side regions along which perforation 16 the tape member may be cut off in two in the circumferential direction.