Toilet seat for water closet

The present invention relates to a toilet seat for a water closet, and more specifically, provides a toilet seat for a water closet having a sliding function so as to allow a person with reduced mobility such as a patient, a handicapped person, an elderly person and the like to easily and readily move from a wheelchair and the like thereto and to comfortably relieve oneself. To this end, the toilet seat for a water closet of the present invention comprises: a base provided on the upper surface of a toilet bowl; a slider seat mounted on the upper surface of the base to enable forward and backward positional movement; a guide seat coupled to the front of the slider seat to enable up and down rotation; and a slider rail provided between the base and the slider seat to guide the forward and backward positional movement of the slider seat.