Flush toilet

A flush toilet flushed by stored flush water to discharge waste, comprising:

• a reservoir tank for storing flush water;
• a toilet main unit including:
• a water passageway for directing flush water supplied from the reservoir tank, a bowl portion connected to this water passageway, in which a spout port is formed, and a discharge trap pipe;
• a water supply apparatus for supplying flush water from a water source into the reservoir tank;
• a water discharge apparatus for supplying flush water stored in the reservoir tank to a water passageway in the toilet main unit;
• and
• a flush control device for controlling the flushing of the bowl portion by driving the water discharge apparatus to supply flush water stored in the reservoir tank through the water passageway to the spout port;
• wherein the flush control device includes a time measurement device for measuring the water level rise time from a state in which the water discharge apparatus is turned off until a predetermined water level is reached inside the reservoir tank, after the water discharge apparatus is driven for a predetermined time to discharge flush water,
• and an adjustment device for adjusting the driving time of the water discharge apparatus in response to pressure losses in the toilet main unit using the water level rise time measured by this time measurement device.