To provide a device for treating a photographic waste solution, which is low in cost and capable of easily taking out a concentrated solid material easy to handle out of the photographic waste solution.

In a photographic waste solution treating device for treating a waste solution discharged from treating process of photographic sensitive materials exposed to light, the objective photographic waste solution treating device is equipped with a stocking part for stocking a solution absorbable particulate material, a particulate material supplying means for supplying the particulate material to a waste solution evaporation part from the stocking part, a waste solution supplying means for supplying the waste solution to the particulate material being supplied into the waste solution evaporation part, a heating/concentrating means for accelerating the evaporation of volatile components in the waste solution in the particulate material at the waste solution evaporation part, a recovering part for recovering and storing the particulate material containing concentrated solid material being an evaporation residue of the waste solution and a accommodating means for accommodating the particulate material in the waste solution evaporation part to the recovering part.