BATTERY MOUNT CASE

A battery mounting case includes a case main body, a connector, a temporary placing table, and an exchange preparation mechanism. The case main body has a battery storage part that stores a battery, and a battery mounting port that opens to an upper side of the battery storage part. The connector is conductively connected to the battery stored in the case main body. The temporary placing table is movable between a battery storage position in the battery storage part and a battery extracting position outside the battery storage part. The exchange preparation mechanism moves the connector to a detachment position where the connector is separated from the battery and moves the temporary placing table to a position where the battery is able to be supported before moving the temporary placing table from the battery storage position to the battery extracting position.