To provide a rice-ball making implement by which a properly compacted and good-looking rice ball in a state of being packed can be made easily. Two containers (3), (3) are connected to be openable/closeable by the intermediary of a bend part (5). The container (3) comprises a base element (9) and a standing wall (10) formed on the outer peripheral edge of one side of the base element (9) in a protruding manner. Height of an upper edge of each of two side-part standing walls (16), (16) constituting the standing wall (10) is made to become gradually larger toward the front end. When the two containers (3) (3) are bent in a manner of closing them, a side-part standing wall (16a) and a front-end standing wall (19a) of one container (3a) overlaps an inside of a side-part standing wall (16b) and an inside of a front-end standing wall (19b) of the other container (3b).