To provide a press iron of a clothes pressing machine that can contribute to weight reduction while maintaining the strength so as not to be deformed by heat of steam or pressure during pressing, lower the price of the clothes pressing machine by allowing the use of a small inexpensive driving unit, and facilitate a manufacturing work and an assembling work.

In a press iron of a clothes pressing machine, an interior 2 is formed in a hollow shape, and heating steam is supplied to the interior 2 from outside. Flow path forming members 8 are provided in the interior 2 to uniformly guide steam flown in from a steam supply port 7 to the whole interior 2 and to prevent the interior 2 from being crushed.