PURPOSE: To form a lighting apparatus in a thin size easily, and reduce the width size of a frame body.

CONSTITUTION: An apparatus main body 15 is of a box-like form having a pair of end surface parts 21 and a pair of side surface parts 23 perpendicular to the end surface parts 21 and forming into a box shape with its bottom surface opened, and it is embedded in a ceiling surface 12. A thin-type ballast 41 is installed on the inner side of the end surface part 21. A frame body installing means 57 is disposed on the inner side of the side surface part 23. A frame body 44 is installed on the front surface side of the aperture 25. A louver 55 is installed on the inner side of the frame body 44.