Provided is a storage box for containing therein a columnar hollow injection-solution container. The storage box includes a case opening at a top end thereof, and a mounting section provided in the vicinity of a lower end of the case, and designed to mount the injection-solution container thereon. The mounting section includes protrusion rows. Each of the protrusion rows includes a plurality of protrusions each upwardly extending or expanding from an upper surface of the mounting section in a predetermined direction. Phases of the protrusions are alternately arranged in the predetermined direction within the adjacent protrusion rows. The mounting section further includes a wavy section at the upper surface thereof. The wavy section includes mountain parts and valley parts alternately positioned in the predetermined direction. The protrusion rows are arranged along summits of the mountain parts. According to the storage box, the injection-solution container thrown in any posture into the case is caused to take a laid-down posture.
