Abstract: Disclosed is a web-pulling slider unit 1 for an automatic web leading device including a guide rail arranged along a web-leading path of a rotary press. The slider unit is adapted to be slidably moved along the guide rail. The slider unit comprises a closely-wound coiled spring 2, a tubular-shaped elastic member 3 formed with a connection member 7 adapted to be connected to a web, and a non-stretchable flexible center member 4 inserted through the coiled spring 2 and the elastic member 3 which are aligned adjacent to each other with a contact between respective ones of opposite ends thereof. Each of the coiled spring 2 and the elastic member 4 has the other end fixed to the center member 4. The slider unit of the present invention can stably pull and guide a web over the entire wed-leading path including a region with a complicated configuration.