Abstract: A slider for a slide fastener having a cover member capable of rotating between a first position at which a pull tag is concealed in an immobile state and a second position at which the pull tag is exposed, wherein engaging/disengaging means for engaging with/disengaging from each other when the cover member is located at the first position is provided at a portion on first end portions side apart from respective rotating portions of second end portions, the second end portion having the rotating portions in which the pull tag and the cover member are coupled so as to be able to rotate relatively, thereby providing the slider a simple structure and costing low, being capable of achieving a pull tag holding performance stable and excellent over a long period and preventing deflections between respective components.