A temperature control device comprises a first heat exchange unit, for exchanging heat, which is thermally joined with a recording head for recording onto a recording medium by the use of heat energy, a second heat exchange unit for exchanging heat with the atmosphere, which is connected to the first heat exchange unit, working fluid contained within the first heat exchange unit and the second heat exchange unit, and a partition plate for almost separating the interior of the first heat exchange unit and the second heat exchange unit into a working fluid existing region and a vapor existing region where the working fluid and its vapor component exist together.