To provide a method for recovering a support from a recording material, wherein a coating film is formed on the support using a natural or synthetic polymer binder, in a state usable as a raw material of the support for the recording material.

A chip-like recording material wherein at least one coating film is provided on the polyester resin support, is treated with an alkaline treatment liquid in a treatment tank using a stirrer and, after the polyester resin support is separated, it is recovered through treatment using an acidic treatment liquid. The stirrer has the treatment tank and at least two stirring blades attached to a rotary shaft through attaching members and R being 0.01-100 times the outer shape size of the chip-like recording material is applied to the corner part of each of the blades.