A fixing structure for a multi-screen display unit which forms a large screen by contiguously disposing a plurality of display units with respect to a mounting pedestal by making a first supporting member provided on the back surface of the display unit be engaged with a second supporting member provided at the mounting pedestal, wherein the first supporting member includes a monitor fitting which has a display-side supporting plate provided so as to protrude from the back surface and is disposed at a corner portion of the back surface of the display unit, the second supporting member includes a fixing-side supporting plate which is provided at a position corresponding to the display-side supporting plate to protrude toward the back surface and supports the display-side supporting plate, and a pin member is provided in an upright manner at the fixing-side supporting plate.