The present invention provides a pallet, which includes a base board and first secondary boards movably coupled to two opposite sides of the base board, and first coupling axles connecting between the base board and the first secondary boards. Each first coupling axle includes a first base from which a first extension section extends. The first extension section forms first flexible engagement keys. The base board forms first receiving sections corresponding to the first bases and also forming first track channels corresponding to the first extension sections. Each first track channel forms therein first retention slots corresponding to the first flexible engagement keys. The first bases are movably received in the first receiving slots. The first flexible engagement keys are receivable in the first retention slots to retain the first coupling axles in the base board. The first extension sections have ends fixed in the first secondary boards.