Abstract: A plug-in massage structure and a plug-in massage device are provided. The plug-in massage structure includes a carrier having a cylindrical area and a recess area, and the carrier can be fully inserted into a hole-shaped part to be massaged; the cylindrical area is an approximately cylindrical structure matched with an inner cavity of the hole-shaped part to be massaged; the virtual cylinder is a virtual cylindrical structure formed by the cylindrical area maintaining its cylindrical end surface and extending to the recess area; a depth of the recess area is M, and M is a height of a tunnel center line of the tunnel-type recess structure; a massage assembly having massage elements disposed in the recess area; and the massage elements each has a degree of freedom A in the recess area.