An endoscope device includes an insertion portion cover as an insertion portion main body insertable into an examinees body and having flexibility, and a helical shaped portion as a propulsion force generating portion which is rotatably placed around an outer circumference of the insertion portion cover, centered around the axis thereof, and formed in a clockwise winding toward a distal end side of the insertion portion cover. The endoscope device can thus achieve good operationality of the insertion portion, low cost, and improved insertability into a deep part in a body cavity without inflicting a pain on a patient.
