A zipper, comprising a pair of opposite tapes, each tape comprising a bonding area, and a plurality of teeth positioned on the bonding area along a length direction of the tape, each tooth defining a positioning groove, the bonding area of each tape jamming into the positioning grooves of the plurality of teeth to position the teeth on the tape; wherein a portion of the bonding area of each tape corresponding to one tooth defines at least one positioning hole, and each tooth comprises at least one post located in the positioning groove of the tooth, and the post passes through a corresponding positioning hole to fix the tooth on the tape; each tooth comprises a lower body and an upper body located upon the lower body, the positioning groove is located between the upper body and the lower body, and comprises a fixing groove and a inserting groove extending from the fixing groove and to an exterior surface of the tooth, and two ends of the post are respectively connected with the upper body and the lower body, and wherein each tape comprises a filler cord latched into the fixing groove, a group of warp yarns, and a group of continuously distributed weft yarns interwoven with the group of warp yarns, and wherein the bonding area of each tape inserts into the inserting grooves of the teeth, and wherein the post of each tooth is located at the inserting groove of the tooth and passes through a corresponding positioning hole in the bonding area of the tape; the upper body of each tooth comprises an upper surface and a side surface; characterized in that: the upper body comprises a first slant surface, and wherein the upper surface comprises a top surface and a second slant surface obliquely extending from the top surface and downwards the lower body, and wherein the second slant surface gradually shrinks to be a point, and the first slant surface connects between the upper surface and the side surface, the upper body comprising a head_ and a tail extending from the head, and the side surface comprises a pair of first sub surfaces, a pair of second sub surfaces, and a third sub surface, and wherein one end of one of the first sub surfaces intersects one end of another one of the first sub surfaces to collectively forms the head of the upper body, and wherein the pair of second sub surfaces extend from other ends of the pair of first sub surfaces, respectively, and the third sub surface connects between the pair of second sub surfaces, and the pair of second sub surfaces and the third sub surface collectively forms the tail of the upper body and wherein an included angle between the pair of first sub surfaces is larger than 30° and less than 45°. the upper body comprises a first slant surface, and wherein the upper surface comprises a top surface and a second slant surface obliquely extending from the top surface and downwards the lower body, and wherein the second slant surface gradually shrinks to be a point, and the first slant surface connects between the upper surface and the side surface, the upper body comprising a head_ and a tail extending from the head, and the side surface comprises a pair of first sub surfaces, a pair of second sub surfaces, and a third sub surface, and wherein one end of one of the first sub surfaces intersects one end of another one of the first sub surfaces to collectively forms the head of the upper body, and wherein the pair of second sub surfaces extend from other ends of the pair of first sub surfaces, respectively, and the third sub surface connects between the pair of second sub surfaces, and the pair of second sub surfaces and the third sub surface collectively forms the tail of the upper body and wherein an included angle between the pair of first sub surfaces is larger than 30° and less than 45°.