A coil-shaped fastener element (20) of the present invention is sewn to a fastener tape (13) without using a core string. An upper leg portion (23) of the fastener element (20) has a first upper surface (27a) continued from a connecting portion (24) and contacting a sewing thread (14, 16), and a second upper surface (27b) extending and sloping upward from the first upper surface (27a) via a bent portion (28). A height dimension (H1) between a top end surface (27c) and the bent portion (28) of the upper leg portion (23) is 20% or larger of a height dimension (He) of the fastener element (20). The upper leg portion (23) has a first lower surface (26a) which is sloped to be apart from the fastener tape (13) toward a coupling head portion (21), and the upper leg portion (23) has an element contacting portion (23a) in an area of the first lower surface (26a). Thereby, cost reduction of the slide fastener (1) can be attained, and the fastener element (20) can be prevented from passing through the sewing thread (14, 16) and exiting.