Abstract: Disclosed is a toilet seat cover closure device responsive to the flow of water in a toilet tank during a flushing operation to operate a push pin to urge the cover from a substantially vertical position to a horizontal position over a toilet seat on a toilet bowl. In a first embodiment the push pin is operated by a bowden wire in response to the pressure of water filling the water tank. In a second embodiment the push pin is operated by a cable arrangement responsive to the lowering of the water in the toilet tank during the first part of the flushing operation. With both embodiments a dampening mechanism is provided to control the rate of descent of the cover, comprising a spring-biased cam element cooperating with cam faces on the cover pivot shaft connected to move with said cover.