Slide fastener

A slide fastener with first and second separable interfitting parts having a pair of first and second fastener stringers in which an element row is formed in right and left fastener tapes, one of the first and second separable interfitting parts is fixed to one end of the element row in the first fastener stringer and another one of the first and second separable interfitting parts is fixed to one end of the element row in the second fastener stringer, and a slider slidably attached along the element row of the first fastener stringer, wherein the slider includes a guide post, upper and lower blades connected to the guide post, a flange arranged at right and left side edges of at least one of the upper and lower blades, and a tape insertion gap formed at right and left side edges of the slider, the first separable interfitting part includes a slider-holding part that holds the slider on a sliding end, and the second separable interfitting part is configured to be insertable/removable into/from the slider held on the slider-holding part in a tape width direction through the tape insertion gap, wherein

• the second separable interfitting part includes a body part in a thin-plate shape fixed to the fastener tape and a protruding part arranged at an end on a side of the element row of the body part and formed thicker than the body part,
• the protruding part includes an opposed end arranged on the side opposite to the first separable interfitting part and a side surface arranged on the opposite side to the side opposite to the first separable interfitting part, and
• a dimension of the protruding part in the tape width direction is defined as a first dimension A, a dimension between a back end on the opposite side of the side of the element row on the side surface of the protruding part and the opposed end on the side opposite to the first separable interfitting part is defined as a second dimension B, and a dimension equal to an interval between the guide post and the flange in an element guide passage on a shoulder side of the slider is defined as a third dimension C, and the protruding part has a relationship of the first dimension A<the third dimension C<the second dimension B, and
• when the slider is held on the slider-holding part and the second separable interfitting part is held in an abnormal position with respect to the first separable interfitting part, the opposed end and the side surface of the protruding part are in contact with the guide post and the flange of the slider respectively, and
• the back end of the side surface is arranged in a position on a backward side from the opposed end in a tape length direction, and
• an inclined surface is arranged between the back end of the side surface and the opposed end.