An object is to improve sealing performance of a grommet. A grommet has a grommet main body and a pressing member. The grommet main body formed of an elastic material has a wire harness insertion portion through which the wire harness is inserted and a brim portion provided in an outer periphery of the wire harness insertion portion. The pressing member is configured to be attachable to the attachment plate in a state of being provided in the rear of the brim portion. The pressing member presses the brim portion against the attachment plate in a state of being attached to the attachment plate. A seal portion is provided in a portion of the brim portion opposite to the attachment plate. A recess is provided behind the seal portion of the brim portion.
