A fastener chain comprising a pair of fastener stringers in which a plurality of fastener elements continuing in a coil shape are sewn to right and left fastener tapes with a sewing thread (14, 16); the fastener element comprising a coupling head portion, a lower leg portion extending from one end part of the coupling head portion in a tape width direction and contacting with the fastener tape, an upper leg portion extending in the tape width direction from the other end part of the coupling head portion to be apart from the lower leg portion, and a connecting portion connecting the upper leg portion and the lower leg portion of another fastener element adjacent in a length direction, the fastener element is sewn to the fastener tape such that the upper leg portion and the lower leg portion face to each other via a space portion, the sewing thread (14, 16) pierces the fastener tape, characterized in that: the upper leg portion comprises a first upper surface continuing from the connecting portion, and a second upper surface extending and sloping upward from the first upper surface via a bent portion toward the coupling head portion, the sewing thread (14, 16) is disposed to contact with the first upper surface of the upper leg portion, a height dimension between a position of a top end surface of the upper leg portion disposed farthest from the fastener tape and a position of the bent portion is 20% or larger of a height dimension (He) of the entire fastener element, the upper leg portion comprises a first lower surface which is sloped to be apart from the fastener tape toward the coupling head portion, and a second lower surface which is sloped to approach the fastener tape toward the coupling head portion or parallel to the fastener tape, and the upper leg portion comprises an element contacting portion with which the fastener element of the coupling counterpart is contacted. the fastener element is sewn to the fastener tape such that the upper leg portion and the lower leg portion face to each other via a space portion, the sewing thread (14, 16) pierces the fastener tape, characterized in that: the upper leg portion comprises a first upper surface continuing from the connecting portion, and a second upper surface extending and sloping upward from the first upper surface via a bent portion toward the coupling head portion, the sewing thread (14, 16) is disposed to contact with the first upper surface of the upper leg portion, a height dimension between a position of a top end surface of the upper leg portion disposed farthest from the fastener tape and a position of the bent portion is 20% or larger of a height dimension (He) of the entire fastener element, the upper leg portion comprises a first lower surface which is sloped to be apart from the fastener tape toward the coupling head portion, and a second lower surface which is sloped to approach the fastener tape toward the coupling head portion or parallel to the fastener tape, and the upper leg portion comprises an element contacting portion with which the fastener element of the coupling counterpart is contacted. the upper leg portion comprises a first upper surface continuing from the connecting portion, and a second upper surface extending and sloping upward from the first upper surface via a bent portion toward the coupling head portion, the sewing thread (14, 16) is disposed to contact with the first upper surface of the upper leg portion, a height dimension between a position of a top end surface of the upper leg portion disposed farthest from the fastener tape and a position of the bent portion is 20% or larger of a height dimension (He) of the entire fastener element, the upper leg portion comprises a first lower surface which is sloped to be apart from the fastener tape toward the coupling head portion, and a second lower surface which is sloped to approach the fastener tape toward the coupling head portion or parallel to the fastener tape, and the upper leg portion comprises an element contacting portion with which the fastener element of the coupling counterpart is contacted.