The present invention relates to a catheter device for a cranial cavity. Advantages of a conventional catheter structure for transferring a drug and a bodily liquid through different pathways are maintained, and the outer diameter of a catheter is regularly formed, so a brain positioning device which is useful in accurately positioning a catheter end in a brain ventricle can be easily used. A catheter rear side can be easily tunneled in a round space between a skull and skin, so an operation can be conveniently and easily performed and operation safety is remarkably improved. According to the present invention, the outer diameter of a catheter does not have a protruding part, so a catheter end can be accurately and easily disposed in a brain ventricle of an affected area by using a brain poisoning device. Also, a catheter can be easily induced to be bent through a round space between the top of a skull and skin, and a catheter rear end part can be easily discharged to the outside of a cranial cavity through a punching unit.
