An article fixing device (10, 400) for fixing an article to an installation panel (20, 310, 410, 411), comprising: a fixing device body (30, 320, 420) having a connect-through hole (31, 321, 421) passing into a pass-through hole (21, 311) connecting front and rear surfaces of said installation panel (20, 310, 410, 411); a fastening device inserted through said connect-through hole (31, 321, 421) of said fixing device body (30, 320, 420) into said pass-through hole (21,311) of said installation panel (20, 310, 410, 411); wherein said fixing device body (30, 321, 420) comprises a contact surface extending outwardly from an inner diameter of said pass-through hole (21,311) and contacting with a front surface of said installation panel (20, 310, 410, 411); and wherein said fastening device comprises at least one pair of engaging sections (61, 121, 371,443, 532, 603), said engaging sections (61, 121, 371, 443, 532, 603), in a state in which each fastening device passes through said connect-through hole (31, 321, 421) and said pass-through hole (21, 311), facing each other away from the rear surface of said installation panel (20, 130, 410, 411), being larger than an inner diameter of the pass-through hole (21, 311), and projecting outwards with backs against each other; and a lever (70, 350, 450, 540, 541) being held rotatably by said fastening device, and moving said fastening device in a direction retracting from said pass-through hole (21, 311) by rotation thereof, the lever(70, 350, 450, 540, 541) fixing said engaging section (61, 121, 371, 443, 532, 603) to said rear surface of said installation panel (20, 310, 410, 411), characterized in that a rotation restricting device (323, 353) for stopping unexpected rotation of said lever (70, 350, 450, 540, 541) is provided between said fixing device body (30, 320, 420) and said lever (70, 350, 450, 540, 541), said rotation restricting device (323, 353) comprising an elastic contact piece and a contacted part to be contacted by the elastic contact piece. a fixing device body (30, 320, 420) having a connect-through hole (31, 321, 421) passing into a pass-through hole (21, 311) connecting front and rear surfaces of said installation panel (20, 310, 410, 411); a fastening device inserted through said connect-through hole (31, 321, 421) of said fixing device body (30, 320, 420) into said pass-through hole (21,311) of said installation panel (20, 310, 410, 411); wherein said fixing device body (30, 321, 420) comprises a contact surface extending outwardly from an inner diameter of said pass-through hole (21,311) and contacting with a front surface of said installation panel (20, 310, 410, 411); and wherein said fastening device comprises at least one pair of engaging sections (61, 121, 371,443, 532, 603), said engaging sections (61, 121, 371, 443, 532, 603), in a state in which each fastening device passes through said connect-through hole (31, 321, 421) and said pass-through hole (21, 311), facing each other away from the rear surface of said installation panel (20, 130, 410, 411), being larger than an inner diameter of the pass-through hole (21, 311), and projecting outwards with backs against each other; and a lever (70, 350, 450, 540, 541) being held rotatably by said fastening device, and moving said fastening device in a direction retracting from said pass-through hole (21, 311) by rotation thereof, the lever(70, 350, 450, 540, 541) fixing said engaging section (61, 121, 371, 443, 532, 603) to said rear surface of said installation panel (20, 310, 410, 411), characterized in that a rotation restricting device (323, 353) for stopping unexpected rotation of said lever (70, 350, 450, 540, 541) is provided between said fixing device body (30, 320, 420) and said lever (70, 350, 450, 540, 541), said rotation restricting device (323, 353) comprising an elastic contact piece and a contacted part to be contacted by the elastic contact piece.