To easily and surely discriminate an empty can from a PET bottle without using any expensive sensor, and without requiring any complicate structure.

A container collection machine comprises a container collection part 10 to store a container 4 to be squeezed, a container pushing tool 11, a loading means comprising a male screw rod 13 to apply the prescribed force to the pushing tool 11, a limit switch 12 and a motor 14, a limit switch 15 to check the position of the pushing tool 11 when the container 4 is squeezed, a flag 16 to sort a can or a PET bottle into each collection box after the can or the PET bottle is discriminated by whether or not the limit switch 15 is turned ON, and a processing unit to control the motor 14 and the flag 16. In particular, the load to be applied to the container 4 is 4.5KN.