An endoscopic treatment tool set, comprising: an endoscopic treatment tool that includes a sheath in which a lumen extending from a distal end to a proximal end of the sheath is formed, an elongated shaft which is inserted into the lumen, the elongated shaft being configured to protrude and retract from the distal end of the sheath, and the elongated shaft including an insertion passage therein, a stylet which is disposed in the insertion passage to be movable relative to the elongated shaft, an implant which includes a proximal end portion connected to a distal end of the stylet in the insertion passage, and a manipulation part which is provided at a proximal end side of the sheath; characterized in that: the endoscopic treatment tool set further includes a jig that is configured to be connected to a proximal end portion of the stylet, the endoscopic treatment tool is packed together with the jig in a state in which the proximal end portion of the implant is located inside the insertion passage and a distal end portion of the implant is exposed from the elongated shaft, the jig is coupled to the proximal end portion of the stylet disposed in the manipulation part and the jig is configured to be movable relative to the manipulation part, the implant is connected to the jig via the stylet, and the implant is configured such that when the jig is pulled toward a proximal end side of the manipulation part, the stylet is moved to a proximal end side in the insertion passage and the implant is loaded in the insertion passage. a sheath in which a lumen extending from a distal end to a proximal end of the sheath is formed, an elongated shaft which is inserted into the lumen, the elongated shaft being configured to protrude and retract from the distal end of the sheath, and the elongated shaft including an insertion passage therein, a stylet which is disposed in the insertion passage to be movable relative to the elongated shaft, an implant which includes a proximal end portion connected to a distal end of the stylet in the insertion passage, and a manipulation part which is provided at a proximal end side of the sheath; characterized in that: the endoscopic treatment tool set further includes a jig that is configured to be connected to a proximal end portion of the stylet, the endoscopic treatment tool is packed together with the jig in a state in which the proximal end portion of the implant is located inside the insertion passage and a distal end portion of the implant is exposed from the elongated shaft, the jig is coupled to the proximal end portion of the stylet disposed in the manipulation part and the jig is configured to be movable relative to the manipulation part, the implant is connected to the jig via the stylet, and the implant is configured such that when the jig is pulled toward a proximal end side of the manipulation part, the stylet is moved to a proximal end side in the insertion passage and the implant is loaded in the insertion passage. the endoscopic treatment tool set further includes a jig that is configured to be connected to a proximal end portion of the stylet, the endoscopic treatment tool is packed together with the jig in a state in which the proximal end portion of the implant is located inside the insertion passage and a distal end portion of the implant is exposed from the elongated shaft, the jig is coupled to the proximal end portion of the stylet disposed in the manipulation part and the jig is configured to be movable relative to the manipulation part, the implant is connected to the jig via the stylet, and the implant is configured such that when the jig is pulled toward a proximal end side of the manipulation part, the stylet is moved to a proximal end side in the insertion passage and the implant is loaded in the insertion passage.