An endoscopic treatment tool used with an endoscope, the endoscope having a channel for inserting a treatment tool, a raising stand for raising the treatment tool inserted into the channel, and an observation optical system, the endoscopic treatment tool comprising: an elongated member (2, 3, 3x, 90, 91) having a distal end, a proximal end, and a lumen formed along a longitudinal axis of the elongated member (2, 3, 3x, 90, 91), a distal indicator disposed between the distal end and the proximal end of the elongated member (2, 3, 3x, 90, 91), the distal indicator extending along the longitudinal axis; and a proximal indicator disposed on the elongated member (2, 3, 3x, 90, 91) at a more proximal side of the elongated member (2, 3, 3x, 90, 91) than the distal indicator, the proximal indicator extending along the longitudinal axis; wherein in a state in which the elongated member (2, 3, 3x, 90, 91) is raised by the raising stand, the distal indicator is positioned in a field of view of the observation optical system when the distal end of the elongated member (2, 3, 3x, 90, 91) is positioned in a branching region of common bile duct and cystic duct, and the proximal indicator is configured to be positioned in the field of view of the observation optical system when the distal end of the elongated member (2, 3, 3x, 90, 91) is positioned in a branching region of left hepatic duct and right hepatic duct, and wherein each of the distal indicator and the proximal indicator has a width less than half of an outer circumferential surface of the elongated member (2, 3, 3x, 90, 91) in a circumferential direction of the elongated member (2, 3, 3x, 90, 91), respectively. an elongated member (2, 3, 3x, 90, 91) having a distal end, a proximal end, and a lumen formed along a longitudinal axis of the elongated member (2, 3, 3x, 90, 91), a distal indicator disposed between the distal end and the proximal end of the elongated member (2, 3, 3x, 90, 91), the distal indicator extending along the longitudinal axis; and a proximal indicator disposed on the elongated member (2, 3, 3x, 90, 91) at a more proximal side of the elongated member (2, 3, 3x, 90, 91) than the distal indicator, the proximal indicator extending along the longitudinal axis; wherein in a state in which the elongated member (2, 3, 3x, 90, 91) is raised by the raising stand, the distal indicator is positioned in a field of view of the observation optical system when the distal end of the elongated member (2, 3, 3x, 90, 91) is positioned in a branching region of common bile duct and cystic duct, and the proximal indicator is configured to be positioned in the field of view of the observation optical system when the distal end of the elongated member (2, 3, 3x, 90, 91) is positioned in a branching region of left hepatic duct and right hepatic duct, and the distal indicator is positioned in a field of view of the observation optical system when the distal end of the elongated member (2, 3, 3x, 90, 91) is positioned in a branching region of common bile duct and cystic duct, and the proximal indicator is configured to be positioned in the field of view of the observation optical system when the distal end of the elongated member (2, 3, 3x, 90, 91) is positioned in a branching region of left hepatic duct and right hepatic duct, and wherein each of the distal indicator and the proximal indicator has a width less than half of an outer circumferential surface of the elongated member (2, 3, 3x, 90, 91) in a circumferential direction of the elongated member (2, 3, 3x, 90, 91), respectively.