Illumination device and attachment member

A mounting member for attaching an organic EL panel to a wall surface detachably and attachably,

• wherein the organic EL panel comprises:
• a panel body having an emission surface on its front face side and a circuit board on its rear face side;
• and
• a fixing member having a main body and a raised part, the fixing member having a plate shape,
• wherein the raised part is disposed on a rear face side of the organic EL panel and raised from the main body to avoid the circuit board,
• wherein the raised part includes a raised-side engagement part protruding in a direction crossing a raised direction,
• wherein the mounting member includes:
• an attachment side main body having a plate shape;
• and a first and a second attachment side engagement parts,
• the first attachment side engagement part extending from the attachment side main body to form a step on a first main surface side of the attachment side main body,
• the second attachment side engagement part extending from the attachment side main body to form a step on a second main surface side of the attachment side main body, and
• wherein the mounting member engages the raised-side engagement part with the first attachment side engagement part to fix the organic EL panel to the first main surface side whereas the mounting member engages the raised-side engagement part with the second attachment side engagement part to fix the organic EL panel to the second main surface side.