To enable a container 2 to be reliably supplied into a pocket P since the container 2 can be prevented from separating or deviating from a suction head 14 when the container 2 is inverted.

A container supply device 5 includes a suction head 14, and the suction head 14 takes out a container 2 at the bottom in a magazine 4 by suction, and then, the container 2 is inverted while being descended to be supplied in a pocket P at a supply position A. The movement of the suction head 14 in inverting the container 2 is controlled by a control means 10 via a rotating mechanism 23 and a lifting and lowering mechanism 24. That is, the control means 10 controls the inverting speed of the suction head 14 so that the container 2 is inverted at a constant speed when the container 2 is inverted.