Abstract: An enclosing casing which enables enclosing media to be seen at a glance among a plurality of enclosing media held in enclosing medium holders of an inner casing is provided. An enclosing casing 1 is constructed by a combination of an outer casing 3 which has an inserting port 4 in one side portion and is formed by folding a paper material and an inner casing 2 which is inserted and ejected into/from the outer casing 3 through the inserting port 4 and is formed by folding the paper material. The inner casing 2 is constructed by enclosing medium holders 2a, 2b, and 2c of a plurality of stages which overlap so as to be relatively movable. All of the enclosing medium holders 2a, 2b, and 2c of the plurality of stages are reciprocatively moved in almost the same direction when they are inserted and ejected into/from the outer casing 3.