To avoid relative movement from substantially being generated between the supporting face of a support and the lower face of a lowermost document.

This storage module used in a document processing line comprises a frame, and at least a pair of the supports movable between a reception position where one or more documents are placed on the supports and a discharge portion where the documents are discharged by the supports forming a downward passage. The pair of supports are provided extending to one plane and movable in mutual directions to separate from each other on the plane where the discharge position and the reception position are set. The supports have the supporting faces on each of which the lowermost document is placed in use.