An ostomy pouch is disclosed which comprises a proximal and a distal side wall of flexible sheet material joined together along their peripheral edges to define a cavity therebetween. The side walls are also joined in at least one location inwardly of the peripheral edges to limit the separation of the proximal and distal side walls. With this construction, the side walls also include a laterally outwardly expandable fold which is formed by at least a portion of at least one of the side walls.
