The present invention relates to a steam boiler to heat the water using the char without using coal or petroleum or electricity made of a high temperature / high pressure steam to the heating, this invention is a frame (102 having a receiving space )and; A bucket 104 which is fixedly installed at a predetermined height at one side surface of the bottom frame 102 and the water supply; At predetermined intervals from the water bottle 104 is installed at a predetermined height at one side of the bottom surface of the frame (102) when supplied with water from the water bottle 104, after heating the water, a steam generation means for generating steam (106 )and; Steam storage of at predetermined intervals from the steam generation unit 106 is installed at a predetermined height at one side of the bottom surface of the frame 102 is stored when supplied with steam from the steam generation unit 106, and discharge the stored stream with an external means (108) and; The water bottle 104 and the steam generating unit 106 is connected to the water supply pipe 110 for supplying water in the water bottle 104 to the steam generating device 106 between and; The steam generation is connected between the means 106 and the steam storage means 108, a steam supply tube 112 supplying the steam generated in the steam generation unit 106 in the steam storage means (108) and; Is installed on one side of the steam storage means 108 is configured to include a discharge pipe 114 for discharging the steam stored in the steam storage means (108) to the outside.