To easily form a space which is sufficient for a cleaning or the like, between the lower surface of a unit fitted on a toilet, on which a toilet seat and a toilet lid are turnably attached, and the toilet.

This lifting mechanism is equipped with a pair of arm bodies 10, 10 of which the free end 10a sides are urged in the direction to go out by an urging means 30, and a damper means 20 for the movement in the direction to bring back the free end 10a sides. One of the pair of the arm bodies 10, 10 comes into contact with the upper surface 103 side of the western toilet by the free end 10a sides, and the other arm body 10 is attached to the side of a unit 200 fitted on the toilet, under a state wherein a pivotably attaching side is positioned at the side of a pivoting attaching part of a unit 200 fitted on a toilet for a western toilet. The urging force of the urging means 30 is set in a manner to become larger than a force in the direction to make the free end 10a sides of the pair of the arm bodies 10, 10 come back by the weight of the unit 200 fitted on the toilet when the unit 200 fitted on the toilet is pivoted from a location wherein the lower surface of the unit 200 fitted on the toilet comes closer to the upper surface 103 of the western toilet, to a specified standing location.