To provide a multipurpose steam generator which can be used without soiling surroundings, suppress the frequency of water supply to the minimum, and safely used without fear of fire.

Upper opening of a lower member 2 is tightly closed by an upper member 3 and a box body 1 partitioned into a water chamber 2A in which salt water is injected at first via a middle partition part 15 and only water from next and a steam chamber 3A to store steam is formed. An electrode part 11 to electrolyze salt water in the lower member 2 is equipped in the box body 1 and a steam discharge part 31 to discharge steam formed by the electrolysis outside is formed in the upper member 3. A plug body 21 to tightly plug a water supply port 7 is constituted of a tag part 22 to tightly plug the water supply port 7 and a casing part 27 constituted by forming plural longitudinal slit parts 26 on the periphery face. When the upper member 3 is covered on the upper opening of the lower member 2, a front central partition plate 5A formed on the underside of a central partition part 15 in between a pair of front partition plates 4A, 4B formed on the lower member 2 is placed facing in a separated condition to form a steam path meandering in the vertical direction.