Fixing device for wall-mounted type toilet and toilet system

A toilet fixing device for fixing a rear side of a flush toilet including a warm water washing device to a wall, the wall-mounted type toilet fixing device comprising:

• a flush water tank device configured to supply flush water to the flush toilet, the flush water tank device being disposed behind the wall so as to be hidden by the wall;
• and
• a fixing unit that is disposed behind the wall so as to be hidden by the wall, the fixing unit being configured to fix the flush water tank device and to fix a rear end portion of a toilet body of the flush toilet to the wall,
• wherein the fixing unit includes:
• a pair of left and right support portions that are configured to extend in a vertical direction at both left and right sides of the flush water tank device and to support the flush water tank device,
• a toilet fixing portion extending in a left-right direction to connect the pair of left and right support portions, the toilet fixing portion being configured to fix the rear end portion of the toilet body via the wall,
• a pair of left and right legs extending downward from the toilet fixing portion, the pair of left and right legs being fixed to a floor in an area behind the wall, and
• a drain pipe connection disposed in the toilet fixing portion, the drain pipe connection being configured to connect an inlet of a drain pipe extending from the floor in the area behind the wall to be close to the toilet fixing portion and a discharge outlet at a rear side of the toilet body via the wall,
• wherein the toilet fixing portion is located below an intermediate position between the floor in the area behind the wall and upper ends of the support portions,
• the pair of legs are disposed outside from the drain pipe connection and inside from a side wall of the toilet body in elevation view, and are disposed laterally asymmetrically to each other with respect to a central axis passing through a center of the drain pipe connection and dividing the fixing unit equally in the left-right direction, in a state where the toilet body is fixed to the toilet fixing portion, and
• respective front end surfaces of the pair of legs are load receiving surfaces configured to receive a load acting toward the legs from a rear of the toilet body via the wall at a time of use of the flush toilet.