Waterproof stringer and waterproof fastener

A waterproof stringer comprising:

• a fastener tape woven from at least one weft thread and plural warp threads;
• a coil-like element sewn to the fastener tape by a machine-sewn thread so as to be placed on a tape bottom surface of the fastener tape;
• and
• a waterproof film laminated onto a tape top surface of the fastener tape on an opposite side of the coil-like element,
• the fastener tape including:
• an element-attachment portion overlapping the coil-like element in a thickness direction of the fastener tape;
• and
• a tape main portion which is a remainder other than the element-attachment portion,
• the machine-sewn thread including plural floating portions each floating over the tape top surface and floating out from a ground structure of the fastener tape, each floating portion having two sinking ends which sink toward the tape bottom surface of the fastener tape as being entrained by a sewing-machine needle which pierces the ground structure of the fastener tape, wherein
• the ground structure of the fastener tape includes a twill weave that is formed to cross a boundary between the element-attachment portion and the tape main portion,
• the floating portion extends to cross a rib and/or a groove between adjacent ribs of the twill weave in the element-attachment portion,
• the waterproof stringer has a plurality of hollows each formed between the floating portions and corresponding to a piercing position of the sewing-machine needle, and
• the plurality of hollows includes one hollow positioned between adjacent ones of the ribs or plural hollows each positioned between adjacent ones of the ribs.