A slide fastener (1, 41, 51, 61, 71) with a separable bottom end stop, including: a slider through which fastener element rows pass, the fastener element rows mounted on opposing side edges of a pair of right and left fastener tapes; and a separable bottom end stop (5, 42, 52, 62, 72) including a fitting body (10, 43, 53, 63, 73) which is provided at an end portion of the fastener element row of one of the fastener tapes and has a to-be-pivoted portion (12, 55, 66), and a pivot stopper body (20, 44, 54, 64, 74) which is provided on an end portion of the fastener element row of the other fastener tape, is capable of engaging with or disengaging from the to-be-pivoted portion (12, 55, 66) of the fitting body (10, 43, 53, 63, 73), and functions as a bottom end stop of the slider, the slider having a guide post, an upper blade plate and a lower blade plate connected by the guide post, flange portions (32a, 32b) erected from right and left side edges of the upper blade plate (31 a) and/or the lower blade plate, and a Y-shaped element guide passage which is surrounded by the upper blade plate, the lower blade plate and the flange portions (32a, 32b) and is branched to two sections by the guide post from a rear mouth to a shoulder mouth of the slider, characterized in that the pivot stopper body (20, 44, 54, 64, 74) has a pivot stopper portion (23, 46, 58, 68, 75) which is capable of engaging with the to-be-pivoted portion (12, 55, 66) by fitting the to-be-pivoted portion (12, 55, 66) in the pivot stopper portion from a side portion of the pivot stopper body (20, 44, 54, 64, 74), and in that the pivot stopper portion (23, 46, 58, 68, 75) is capable of engaging with the to-be-pivoted portion (12, 55, 66) by inserting the to-be-pivoted portion (12, 55, 66) in the pivot stopper portion through the element guide passage from the shoulder mouth of the slider. a slider through which fastener element rows pass, the fastener element rows mounted on opposing side edges of a pair of right and left fastener tapes; and a separable bottom end stop (5, 42, 52, 62, 72) including a fitting body (10, 43, 53, 63, 73) which is provided at an end portion of the fastener element row of one of the fastener tapes and has a to-be-pivoted portion (12, 55, 66), and a pivot stopper body (20, 44, 54, 64, 74) which is provided on an end portion of the fastener element row of the other fastener tape, is capable of engaging with or disengaging from the to-be-pivoted portion (12, 55, 66) of the fitting body (10, 43, 53, 63, 73), and functions as a bottom end stop of the slider, the slider having a guide post, an upper blade plate and a lower blade plate connected by the guide post, flange portions (32a, 32b) erected from right and left side edges of the upper blade plate (31 a) and/or the lower blade plate, and a Y-shaped element guide passage which is surrounded by the upper blade plate, the lower blade plate and the flange portions (32a, 32b) and is branched to two sections by the guide post from a rear mouth to a shoulder mouth of the slider, characterized in that the pivot stopper body (20, 44, 54, 64, 74) has a pivot stopper portion (23, 46, 58, 68, 75) which is capable of engaging with the to-be-pivoted portion (12, 55, 66) by fitting the to-be-pivoted portion (12, 55, 66) in the pivot stopper portion from a side portion of the pivot stopper body (20, 44, 54, 64, 74), and in that the pivot stopper portion (23, 46, 58, 68, 75) is capable of engaging with the to-be-pivoted portion (12, 55, 66) by inserting the to-be-pivoted portion (12, 55, 66) in the pivot stopper portion through the element guide passage from the shoulder mouth of the slider.