To easily install an on-vehicle display device in a vehicle.
The on-vehicle coupling device 100 couples a reinforcement 160 in the vehicle and the on-vehicle display device 150 to install the on-vehicle display device 150 in the vehicle. A first installing member 101 is pasted to the reinforcement 160. A second installing member 102 is engaged with a roof head lining 170 in the vehicle which is positioned between the reinforcement 160 and the on-vehicle display device 150, and the on-vehicle display device 150 is installed to the second installing member 102. A first link member 103, a second link member 104, a third link member 105, and a forth link member 106 couple the first installing member 101 and the second installing member 102 so as to move in a direction in which the first installing member 101 and the second installing member 102 come close to each other and in a direction separating from each other.
AOKI MASAYOSHI
YAMAGATA TETSUJI
