[Problem] To efficiently recover, from incinerated ash, precious metals such as gold, silver and copper, and aluminum contained therein and to effectively utilize ash after recovering the precious metals and the like. [Solution] An incinerated-ash treatment device 1 is provided with: a crusher or/and a classifier that crushes, classifies, or performs both such that the maximum grain size of incinerated ash A1 becomes 5 mm or less; an overcurrent sorter 8 that separates the incinerated ash having a maximum grain size of 5 mm or less, which has been discharged from the crusher or/and the classifier, into conductors E and non-conductors I; and a specific gravity sorter that separates the conductors E discharged from the overcurrent sorter 8 into high-specific-gravity substances H2 and low-specific-gravity substances L2. An air table 10 can be employed as the specific gravity sorter. It is possible to provide a classifier that classifies crushed substances C and has a classification point of 5 mm or less, and to
