Abstract: The present invention relates to an improvement pen-case device comprising a front clamp cover and a rear clamp cover, according to above architecture user not only could lay aside each kind of pens, but also lay up paper that could be more convenient to user for easy reading and operation. If add a magnet into present invention, it could absorb the scattered paper clip and pin; moreover, user also could put the clamp body at any absorbent place for flexible usage, meeting multi-purpose needs.