To provide a heat storage heater in relatively simple structure, in particular a compact heat storage heater for general home use, for eliminating the need for using a fossil fuel that inevitably accompanies the generation of a carbon dioxide as a heat source, eliminating the need for retaining the pressure of the entire system of a heating device at a reduced pressure or less, and eliminating the need for converting a working medium to steam.

A suction type heat storage heater consists of a working medium-sucking device 1, a heating means 2 that is provided at the working medium-sucking device 1, and a condensation means 3 of the working medium being converted to steam, where an entire system is retained essentially at a normal pressure. In the suction type heat storage heater, a working medium supply means 4 to the working medium-sucking device 1 is provided with a number of small holes being dispersed uniformly, and a working medium can be supplied to the working medium-sucking device 1 that is provided at the lower portion of the working medium supply means 4.