A garment de-wrinkling device (1) comprises an enclosure (10) for moistening garments (20). An ironing board (40) and an adjacent standby area (41), which are both permeable to steam, are arranged on top of the enclosure (10). During operation of the device (1), the ironing board (40) and a steam iron (30) are used to iron garments (20) which have first been moistened inside the enclosure (10). In the process, steam released by the iron (30) penetrates the garments (20) and enters the enclosure (10) through the ironing board (40). In this way, both the garments (20) on the ironing board (40) and those inside the enclosure (10) are treated by means of steam that is released by the iron (30), and steam is used in an efficient manner. A pressed look is obtained in that the garments (20) are subjected to a moistening process and a subsequent steam ironing process.