A medical tube assembly is disclosed, which includes a medical tube having a tubular main body in which an implant to be placed indwelling in a living body is insertable, an insertion section having a curved portion and being elongated, an interlock portion interlocking a distal portion of the medical tube and a distal portion of the insertion section in a freely detachable manner, and a rotation restriction unit restricting rotation of the medical tube and the insertion section around an axis. When inserted into a living body with the distal portion of the medical tube and the distal portion of the insertion section interlocked to each other, the insertion section and the main body are inserted in an aligned state.
