The utility model provides an utilization comes from the paper that the printing finishes was peeled off reliably to the air of peeling off the fan from the plate cylinder side porous printing device. This porous printing device convolutes in the hole version body paper of plate cylinder's outer peripheral face with the printing portion of black image printing on the paper including utilizing, utilize the air peel off from plate cylinder side the paper that the printing finishes top portion peel off the fan, and be used for peeling off the fan with the utilization and peel off the paper orientation that the printing of getting off finishes and arrange row's paper baffle of paper direction guide, in the instance, it is equipped with ventilation part spare to arrange the paper baffle, so that the top portion of the paper that finishes in the printing arrives when utilizing the paper to peel off paper that some measurement components recorded and peel off is not detained in row top of paper baffle from peeling off the air that the fan blew.