Slide fastener with a separable bottom stop.

The slide fastener with the separable bottom end stop in which fastener elements (4) are attached to opposing side edges of a pair of fastener tapes (3), comprising the separable bottom end stop (5) made of resin synthetic that is fixed to the side edge of the fastener tape (3) at an end portion of the coupling elements (4), and a reinforcement portion (10) provided integrally with the separable bottom end stop (5) extended toward at at least one face of the fastener tape (3), the reinforcement portions (10) of a plurality of ribs (13) connected to bottom end stop (5) characterized in being formed in that the ribs (13) are formed in a sewing position (40) to an object of sewing (42) so that its height H is 0, 5 to 0, 85 mm and its width W is 0, 6-0, 9 mm and that is gradually widened from a vertex (19) to a base portion (20) and provides a a separating portion (23) wider than the base portion (20) of the rib (13) between the ribs (13).