A case includes a case body including an accommodation space to accommodate electronic components and a discharge port to discharge the electronic components accommodated in the accommodation space, a shutter slidable relative to the case body to open and close the discharge port, a slider integral with the shutter to perform a slide operation of the shutter, and an operation opening in the case body to expose the slider to outside to allow for operation of the slider. A seal including a portion that covers and seals at least the operation opening is attachable to the case body.