To provide a toilet heater for keeping cleanliness by blocking up outflow ports of hot air when using a toilet in an unseated state such as when a male urinates by efficiently blowing the hot air to a hip part and a waist part of a user seated on a stool.

This toilet heater blows the hot air upon the user on the stool by arranging an air blowing duct having an inflow port and a plurality of outflow ports for allowing the inflow of the hot air blown from a hot air generator above a stool rear rising part, and is characterized in that the air blowing duct moves according to opening operation of the stool.