Disclosed herein is a grommet for supporting a bundle of electric wires which passes a fixing hole formed in a partition panel. The grommet comprises an elastic member and a rigid member to be assembled with the elastic member. The elastic member has a wire securing portion in which the bundle of the electrical wires is secured, a sealing lip to be in contact with the partition panel and a fitting portion having an outer periphery on which a concave portion is formed. The rigid member has a lock portion to be locked with the partition panel and a fitted portion to be fitted onto the fitting portion of the elastic member. The fitted portion has an inner periphery on which a convex portion to be engaged with the concave portion of the fitting portion of the elastic member when the elastic member is assembled with the rigid member is formed. The grommet can realize easy and stable composition of the elastic portion and the rigid portion with high sealability.