An endoscopic device comprises an endoscope (10) with an insertion portion (12), and an insertion aid member (70) that is placed over the insertion portion (12) of the endoscope (10) to guide insertion of the insertion portion (12) into a body cavity. A control device (20, 66) controls supply and suction of a fluid into and from the tip of the insertion portion (12) and the tip of the insertion aid member (70).A first duct (104) communicates with the tip of the insertion portion (12), a second duct (150b) communicates with the tip of the insertion aid member (70), and a third duct (150c) carries lubricant to be supplied between the insertion portion (12) and the insertion aid member (70). The first duct (104) is connected to the control device (20, 66) via a connecter portion (18) of the endoscope (10) connected to an external device (20).
