Patent ID: 8678691

Claim:
A writing implement comprising a cylinder-shaped shaft tube, and a cylinder-shaped grip member made of a soft elastic material fitted at a position on the shaft tube where a user can easily grip; the grip member integrally comprising a cylinder-shaped outer shell provided on an outside of the grip member, and an inner shell made of a material softer than the outer shell and provided inside the outer shell; the outer shell is formed of a thin part having a thickness that is thin and a thick part having a thickness that is thick; the inner shell is provided at least on a back side of the thin part inside the outer shell and is in direct contact with the shaft tube; the inner shell has a thick part formed corresponding to the thin part of the outer shell and having a thickness that is larger than a thickness of a thin part of the inner shell formed corresponding to the thick part of the outer shell; at least one part of the outer shell is swollen outward to form a swollen part on a surface of the grip member and the surface of the grip member where the swollen part is formed is swollen outward relative to the surface of the grip member where the swollen part is not formed; the thin part of the outer shell is formed at a part corresponding to the swollen part of the outer shell; and the inner shell is formed inside the thin part of the outer shell corresponding to the swollen part.