There is provided an endoscopic surgery device that can easily acquire an image desired by a surgeon, and that has high operability. The endoscopic surgery device includes: an outer tube body 302 that penetrates through a body wall to be inserted into a body cavity； an endoscope insertion path 304 that is provided inside the outer tube body 302； a treatment tool insertion path 306 that is provided inside the outer tube body 302； an endoscope drive unit 312 that has a non-operating area where an endoscope insertion part 102 inserted into the endoscope insertion path 306 is not moved back and forth, and an operating area that is an area other than the non-operating area, where the endoscope insertion part 102 is moved back and forth； a position sensor 310 that detects a movement amount of treatment tool insertion part 202 with respect to the outer tube body 302 when the treatment tool insertion part 202 moves back and forth； and a control unit 314 that controls the endoscope drive unit 312 in accordance with the movement amount of the treatment tool insertion part 202, detected by the position sensor 310.
