Patent ID: 8684206

Claim:
A rubber plug for a vial container, comprising: a leg portion, a base end side portion made of a material different from that of the leg portion and press molded with the leg portion, the base end side portion having, at a side opposite to the leg portion, a convex portion and a ring-shape recess surrounding an outer circumferential side of the convex portion, and a cap portion bonded to the base end side portion press-molded with the leg portion, and having a top part, a concave portion on a side opposite to the top part, and a ring-shape projection surrounding the concave portion, wherein the convex portion fits into the concave portion and the ring-shape projection fits into the ring-shape recess so that the leg portion and the cap portion are bonded through the base end side portion, the base end side portion is formed of a same material as the cap portion, and the leg portion is formed by a material different from the cap portion.