A medical device is disclosed that can help prevent an object existing in a body lumen from clogging a lumen of an elongated member. The medical device including an elongated member having a lumen extending in an axial direction； an insertion member inserted in the lumen of the elongated member on a distal side of the lumen； and a breaking member fixed on an inner surface of the elongated member such that a gap is formed between the insertion member and the breaking member in the lumen of the elongated member on the distal side, and wherein the breaking member exerts a shearing force to the object by rotating relative to the insertion member while the object is between the insertion member and the breaking member.
