An endoscopic suture needle and related surgical endoscopic suturing devices are to be used in conjunction with an endoscope. The invention relates to suturing of internal body tissue as part of a surgical procedure which may be diagnostic, therapeutic or both. In accordance with the present invention, there is provided an endoscopic surgery system comprising a temperature biased suture needle, a needle grasping device, and an elongated catheter or other delivery tube, a endoscopic surgery system configured for use in conjunction with a flexible or rigid endoscope insertion member.