To achieve the efficient conveyance of messages.

The pachinko ball case 10 is used being attached to the pachinko game machine to house the pachinko balls has the case body 20 with the top opened which has a bottom plate part 22 and the first and second wall plate parts 24a and 24b and a message card housing part 30 which is provided on the external surface of the first wall plate part 24a of the case body 20 to have massage cards 50 replaceably inserted into it while being made visually recognizable as housed in it. A plurality of message cards 50 can be housed on top of each other into the message card housing part 30. The message card housing part 30 has a front plate part 32 for shielding the message cards 50 along with transparency.