A slide fastener comprising: a pair of fastener stringers (2,4) including a fastener tape (10,20) and a fastener element (30,40) arranged on a side-edge (13,23) of the fastener tape (10,20), the fastener tape (10,20) having tape upper and lower surfaces (11,12,21,22) which define a tape thickness; and a slider to be moved to open or close the pair of fastener stringers (2,4), the slider including a slider upper portion arranged at the same side as the tape upper surface (11,21), a slider lower portion arranged at the same side as the tape lower surface (12,22), and a connecting portion connecting the slider upper portion and the slider lower portion, wherein at least one fastener tape (10,20) is provided with a wall (14,24) configured to prevent jamming of a cloth, the wall (14,24) being arranged to be spaced apart from the fastener element (30,40), the wall (14,24) includes a wall upper portion (14A,24A) arranged at the same side as the tape upper surface (11,21) and protruding from the tape upper surface (11,21), and a wall lower portion (14B,24B) arranged at the same side as the tape lower surface (12,22) and protruding from the tape lower surface (12,22), in at least a part of a movable range of the slider, the slider upper portion is positioned adjacent to the wall upper portion (14A,24A) and the slider lower portion is positioned adjacent to the wall lower portion (14B,24B) so that jamming of a cloth in the slider is prevented at both sides of the tape upper and lower surfaces (11,12,21,22), characterized in that: the wall (14,24) is flexible and includes a tubular structure (15,25) of the fastener tape (10,20) and a flexible core (16,26) enclosed in the tubular structure (15,25). a pair of fastener stringers (2,4) including a fastener tape (10,20) and a fastener element (30,40) arranged on a side-edge (13,23) of the fastener tape (10,20), the fastener tape (10,20) having tape upper and lower surfaces (11,12,21,22) which define a tape thickness; and a slider to be moved to open or close the pair of fastener stringers (2,4), the slider including a slider upper portion arranged at the same side as the tape upper surface (11,21), a slider lower portion arranged at the same side as the tape lower surface (12,22), and a connecting portion connecting the slider upper portion and the slider lower portion, wherein at least one fastener tape (10,20) is provided with a wall (14,24) configured to prevent jamming of a cloth, the wall (14,24) being arranged to be spaced apart from the fastener element (30,40), the wall (14,24) includes a wall upper portion (14A,24A) arranged at the same side as the tape upper surface (11,21) and protruding from the tape upper surface (11,21), and a wall lower portion (14B,24B) arranged at the same side as the tape lower surface (12,22) and protruding from the tape lower surface (12,22), in at least a part of a movable range of the slider, the slider upper portion is positioned adjacent to the wall upper portion (14A,24A) and the slider lower portion is positioned adjacent to the wall lower portion (14B,24B) so that jamming of a cloth in the slider is prevented at both sides of the tape upper and lower surfaces (11,12,21,22), characterized in that: the wall (14,24) is flexible and includes a tubular structure (15,25) of the fastener tape (10,20) and a flexible core (16,26) enclosed in the tubular structure (15,25).