PROBLEM TO BE SOLVED: To provide a luminaire capable of preventing a gap from being generated at contraction and preventing itself from contact to a frame body at expansion, as well as securing a large projection part. SOLUTION: The luminaire 10 is provided with a frame body 21 in which a lamp tube 14 is housed in a body 11 from an opening 12 covered with a cover 16, and the cover can be attached to and detached from the opening 12, a resin panel 22 which transmits light of the lamp tube 14 to the frame body 21, and a press stopper 23 to prevent the resin panel 22 from being separated from the frame body 21. The cover 16 is provided with a double-sided adhesive sheet 32 to prevent the resin panel 22 from moving by holding the resin panel 22 to the frame body 21 at a place other than both ends 22b of the resin panel 22. COPYRIGHT: (C)2010,JPO&INPIT