Slider for slide fastener and slide fastener comprising same

The slider is provided with: a slider body (2) in which an insertion hole (6) is formed, the insertion hole (6) extending from an insertion opening (61) on the side of an upper wing plate (21) toward a lower wing plate (22) and forming a cavity in a connecting column (23); a pull tab (3) which is attached to the slider body (2) so as to be pivotable between a collapsed posture and an inverted posture on the upper wing plate (21); a spring member (4) attached to the slider body (2) so as to sandwich a portion (31) of the pull tab (3); and a cover (5) attached to the slider body (2) so as to cover at least the spring member (4). The spring member (4) includes a front leg (41) inserted into the insertion hole (6) via the insertion opening (61). The cover (5) is configured so as to have a restriction section (7) that restricts a change in the position above the front leg (41) of the spring member (4) at a position above the insertion hole (6). 拉头具备：拉头主体(2)，其形成有插入孔(6)，该插入孔(6)以从上翼板(21)侧的插入口(61)朝向下翼板(22)并在连接柱(23)形成空