A surgical instrument (100) for joining tissue surgically, the surgical instrument (100) comprises: a handle assembly (104)； an elongated part (102) extending distally from the handle assembly (104) and defining a longitudinal axis (A-A)； and an end effector (200) disposed adjacent to a distal part of the elongated part (102), the final effector (200) includes: a first jaw member (210) defining a first axis (FF) extending thereto along the first jaw member (210), the first jaw member (210) being pivotable about the first axis (FF) with respect to the distal part of the elongated part and the first axis (FF) being transverse to the longitudinal axis ( AA) of the elongated part (102)； and a second jaw member (220) defining a second shaft (S-S) that extends along the second jaw member (220)； at least one of the first jaw member (210) and the second jaw member (220) is movable with respect to the other between a spacing position and an approach position； characterized in that: the second jaw member (220) is pivotable about the second axis (S-S) with respect to the distal part of the elongated part； and the second axis (S-S) is parallel to the first axis (F-F).Un instrumento quirúrgico (100) para unir tejido quirúrgicamente, el instrumento quirúrgico (100) comprende: un conjunto de asidero (104)； una parte alargada (102) que se extiende distalmente desde el conjunto de asidero (104) y que define un eje longitudinal (A-A)； y un efector final (200) dispuesto adyacente a una parte distal de la parte alargada (102), el efector final (200) incluye: un primer miembro de mordaza (210) que define un primer eje (F-F) que se extiende a lo largo del primer miembro de mordaza (210), siendo el primer miembro de mordaza (210) pivotable alrededor del primer eje (F-F) con respecto a la parte distal de la parte alargada y siendo el primer eje (F-F) transversal al eje longitudinal (A-A) de la parte alargada (102)； y un segundo miembro de mordaza (220) que define un segundo eje (S-S) que s
