A blister packaging machine manufactures a blister pack including a pocket portion formed in a container film of a belt-like shape and a cover film that closes the pocket portion. The blister packaging machine includes: a conveyor that conveys the container film; a preheater that preheats the container film conveyed by the conveyor; a pocket portion former that forms the pocket portion in the container film softened by the preheater; and a support belt that moves in synchronism with the container film conveyed by the conveyor while supporting a part of the container film other than the pocket portion or a part of the container film other than an area where the pocket portion is to be formed, in at least a location from the preheater to a position downstream of the pocket portion former.