<p>An oral hygiene device (2) provided with a device body and a functional component (50) that acts on the oral cavity. The device body comprises: a body case (11) that can be joined to the functional component and can be separated from the functional component; a grip case (70) that covers outer surfaces (20, 30) of the body case and has an external grip surface that is gripped when the oral hygiene device is used; and an exterior portion (12) that is located between the external grip surface and the functional component (50) in the lengthwise direction of the device body. The exterior portion (12) has an outer surface located further outward than the external grip surface in the cross-section orthogonal to the lengthwise direction of the device body. The outer surfaces of the device body include the external grip surface and the outer surface of the exterior portion.</p>
