The popcorn popper blowout stopper is an accessory unit of a round rimmed screen with an arm and a handle attached to be able to position the screen over the discharge outlet/heating chamber within the popper assembly. The screen will prevent kernels (but not the airflow) from leaving the popcorn popper burning pets, people/children and landing on the counters and floor. The accessory is important especially in the beginning and the end of the cycle when the output of popped corn is sparse and until the mass of popped corn pushes the accessory into the awaiting bowl. After the mass of popped corn subsides and the output is sparse, the accessory can then be placed again in the popcorn popper for blowout protection to the very end of the cycle. This accessory will fit the Presto, Orville Redenbacher, Conair, Great Northern and many other popcorn poppers.