Tape member for slide fastener and manufacturing method of tape member

A slide fastener comprising a pair of fastener stringers in which each fastener stringer includes a plurality of fastener elements attached to a tape member, wherein:

• each tape member comprises a flexible tape body and a core string portion disposed at a tape side edge portion of the tape body along a length direction and bulging in a top and back direction from the tape body,
• the core string portion is formed by fixing a string member to the tape side edge portion along a tape length direction by machine sewing, and
• the string member is fixed to the tape side edge portion linearly without being pierced by a needle thread of machine sewing and with at least one thread used for machine sewing crossing while contacting and surrounding an outer peripheral surface of the string member not in contact with the tape body, and
• each of the plurality of fastener elements is attached to the tape member and covers a part of the core string portion and a part of the at least one thread used for the machine sewing.