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 having a distal end , a proximal end , and a lumen formed along a longitudinal axis (L) of the elongated member , a distal indicator disposed between the distal end and the proximal end of the elongated member , the distal indicator extending along the longitudinal axis; and a proximal indicator disposed on the elongated member at a more proximal side of the elongated member than the distal indicator , the proximal indicator extending along the longitudinal axis; wherein in a state in which the elongated member 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 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 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 in a circumferential direction of the elongated member , respectively. an elongated member having a distal end , a proximal end , and a lumen formed along a longitudinal axis (L) of the elongated member , a distal indicator disposed between the distal end and the proximal end of the elongated member , the distal indicator extending along the longitudinal axis; and a proximal indicator disposed on the elongated member at a more proximal side of the elongated member than the distal indicator , the proximal indicator extending along the longitudinal axis; wherein in a state in which the elongated member 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 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 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 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 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 in a circumferential direction of the elongated member , respectively. <EOS>