To provide a ceiling panel and a construction method thereof, not damaging furnishings in a bathroom such as a wall panel, and installed in the bathroom space to minimize the dead space after construction.

This ceiling panel includes a temporary stopping support means 3 installed in the vicinity of the side peripheral edge of a ceiling panel body 2 and freely applying and releasing the elastic force to the side wall surface 12a of a unit room installation space to be removable from the side wall surface, wherein the elastic force energized to the side wall surface 12a when it is temporarily stopped is larger than the maximum static frictional force of a contact part between the temporary stopping support means 3 and the side peripheral edge and the side wall surface of the ceiling panel body 2.