Provided are an endoscopic surgical device, an endoscope, and an endoscope operating tool capable of changing a visual field suitable for detailed observation and treatment and improving surgical efficiency, in a configuration in which the endoscope and a treatment tool inserted through two insertion passages provided in an overtube are operable in an interlocking manner each other. An endoscope 100 and a treatment tool 200 are respectively inserted through an endoscope insertion passage and a treatment tool insertion passage of an overtube 300 inserted into a body wall. A forward and backward movement operating part 130 provided in a cable part 104 provided to extend from a base end of an endoscope insertion part 102 of the endoscope 100 is arranged at a position adjacent to an operating part 204 of the treatment tool 200. The forward and backward movement operating part 130 includes a hook part 132 having an opening 134, and a forward and backward movement operation of the endoscope 100 can be performed by passing the index finger of a right hand gripping the treatment tool 200 through the opening 134. Therefore, the forward and backward movement operation of the endoscope 100 can be performed with the forward and backward movement operation of the treatment tool 200 using only the one hand that operates the treatment tool 200.
