Self-locking type slide fastener for zipper

An auto-lock slide fastener slider comprises a slider body (1), a locking plate (2) and a pull tab (3). An upper wing (5) of the slider body (1) has a locking-pawl-insertion hole (11), a recess (10) forwardly extending from the locking-pawl-insertion hole (11), a locking-plate-attachment projection (12) disposed at the front side of the recess (10), and a pair of pull-tab-attachment lugs (14) disposed at opposite sides of the recess (10). The locking plate (2) having at one end an axle (18) rotatably supported by the locking-plate-attachment projection (12) and at the other end a locking pawl (19) inserted in the locking-pawl-insertion hole (11). The pull tab (3) has at one end a pintle (21) rotatably supported by the pull-tab-attachment lugs (14) and a cam (22) on the pintle (21) for pressing the locking plate (2) in such a manner that the locking pawl (19) can project from the locking-pawl-insertion hole (11) to engage a pair of rows of fastener elements. This slider will not give any damage to a garment, thus securing adequate safety.