Abstract: A cassette storing electronic components, which is employed for supplying a plurality of electronic components to an apparatus for mounting electronic components, comprises a plurality of electronic components and a case having a storage space provided in its interior for storing the electronic components and a discharge port communicating with the storage space for discharging the electronic components. In this cassette storing electronic components, the case is provided with a plurality of plate type baffle walls for partially blocking the storage space. Consequently, movement of the electronic components in the case can be suppressed by the baffle walls even if the cassette is extremely moved in a state attached to a mounting machine. Thus, the electronic components as well as the case can be inhibited from reduction in quality, while the number of reusable times of the case can be increased.