A loom with a leno-weaving device which can act completely within the loom heddle frames, with the two links of the leno-weaving device slidably supported within a slide guide. The slide guide extends from within the heddle frames, and is located above the reed, with the two links driven by a single cam drive and a pair of spring-loaded pushers. The spring-loaded pushers can extend into the heddle frames, and are connected to one end of the links, with the links thus raised and lowered within the heddle frames while being slidingly supported by the slide guide. An advantageous cam drive can also be provided which allows for switching of the mode of the operation, to switch the type of weaving being performed by axially moving a shaft upon which cams of the cam drive are mounted.