Abstract: A pen for providing input to an electronic apparatus includes a cylindrical pen body made of a resin, a pen tip attached to one end of the pen body, and a weight member disposed within the pen body and offset from the axis of the pen body. The weight member is of a density higher than that of the rein. This allows the center of gravity of the pen body to be radially eccentric with respect to the axis thereof and aids in preventing rolling of the pen.