A steam iron, preferably a domestic steam iron, comprising: an ironing element or plate (1) which in use comes into contact with a garment to be ironed and includes holes (17) through which steam is in use delivered; a vaporisation element or vaporiser (2) which is fed with water from a reservoir, preferably by a micro-pump, and comprises a vaporisation chamber (3) in which steam is in use generated and a front opening (4) through which the steam is in use delivered to the holes (17) in the plate (1); heating elements (5, 6) for each of the plate (1) and the vaporiser (2); thermostatic temperature regulators for each of the plate (1) and the vaporiser (2); and thermal fuses (9, 10) for each of the plate (1) and the vaporiser (2); characterised in that: the vaporisation chamber (3) includes a rear outlet (11), and the vaporiser (2) includes a pair of deep channels (12), preferably integrated therein, which extend co-laterally to the vaporisation chamber (3) and fluidly communicate the front opening (4) of the vaporiser (2) to the rear outlet (11) of the vaporisation chamber (3).
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