Abstract: Provided is an electronic pen including a tubular housing having an opening at one end, a core body portion including a rod-shaped core body and a pressure member that holds a rear end of the core body and transmits a force applied to the core body, a writing pressure detector that detects a writing pressure applied to the core body, and a tubular holding member that accommodates and holds the core body portion. At least part of a side surface of the core body portion includes a flat surface portion parallel to an axial direction of the pen. An inner edge of the holding member has a cylindrical shape and at least part of the inner edge includes a protruding portion. With the core body portion mounted in the housing, the flat surface portion of the core body portion and the protruding portion of the holding member face each other.

Abstract: Provided is an electronic pen including an electronic pen main part including a first sealing member that covers circumference of a tip side of the electronic pen main part and a second sealing member disposed along an outer edge of the electronic pen main part at a position separate from a tip toward a rear end side of the electronic pen main part, and an inside body that is tubular and has an inner wall surface with which the first sealing member and the second sealing member come into contact through insertion of the tip side of the electronic pen main part into the inside body.