Abstract: The present invention discloses a hook for suspending an object. The hook is fixed on a bracket with at least one pillar and comprises at least one hook groove, a shaft, and a locking member. The hook groove receives the pillar. Each hook groove has a first opening defined between two projecting portions extending from the hook. The locking member is adjacent to one hook groove and comprises a locking part pivotally engaging the shaft and defining a locking groove with a second opening between two end portions thereof One of the two end portions and one projecting portions opposite to the one end portions cooperatively defines a locking opening. The locking opening has an opening dimension smaller than dimension of the pillar. When the hook engages the bracket, the opposing end portion and projecting portion press against the pillar to hold the pillar in the locking groove.