To easily add a human body sensor on an embedded luminaire originally not including the human body sensor.
This embedded luminaire is provided with an annular body 12 put between a ceiling surface 2 and a flange part 7 which is a part of the embedded luminaire main body 4 inserted in an attachment hole 3 formed on the ceiling surface 2 with covering a light source 1 and covers an edge part of the attachment hole 3. The human body sensor is attached on the annular body 12. If the embedded luminaire not including the human body sensor 13 is attached on the ceiling surface 2, the human body sensor can be added on the embedded luminaire simply without spending considerable time and cost by putting the annular body 12 having the human body sensor 13 attached between a flange part 7 and ceiling surface 2.
SUZUKI KENICHI