The invention relates to a chest ironer, and belongs to the technical field of ironing machines. The chest ironer comprises an ironing chest set including arc-shaped ironing chests with upward arc-shaped openings. The ironing chest set includes at least one solid chest and at least one flexible chest, and bridge chests with downward arc-shaped openings are disposed between the ironing chests. The first ironing chest of the ironing chest set is a solid chest, the second ironing chest of the ironing chest set is a flexible chest, and the bridge chest between the first ironing chest and the second ironing chest is a first bridge chest. A horizontal steam chamber partition plate is fixedly arranged at the longitudinal middle position of an outer arc-shaped face plate of an inner chest plate of the solid chest in the horizontal direction, and at least one longitudinal steam chamber partition plate is arranged on the outer arc-shaped face plate of the inner chest plate in the longitudinal direction, so that the ironing chest is partitioned into at least four steam chambers. Each steam chamber is provided with an independent branched steam pipe communicated with a main steam pipe used for centralized supply of steam. The chest ironer is further provided with an adjustable pressurization system. The invention greatly improves the ironing effect under a limited steam pressure.