To provide the structure over the entire part of a door which eliminates the danger of an operator even when all the doors are open or even during the opening work of packing chute flaps.

The packing chute doors (2a and 2b) of the waste press having a press ram ST acting in a vertical direction for forming tied bales consisting of used packaging material consist of the flap portions 2a and 2b which can swivel about horizontal axes S and G. The one flap portion 2a takes a horizontal position in an open position and the free flap portion 2b connected thereto takes a position nearly vertical toward the floor of a workshop.