Abstract: The ice harvesting machine described herein comprises one in which ice, formed in vertical cylinders, bars or sheets, is periodically thawed sufficiently to allow the ice to slide downward to a perforated endless belt having upwardly extending ribs or protrusions which strike the lower end of the ice and break it into pieces which are carried away by the endless belt. In a preferred modification, this machine comprises one in which cylinders of ice are formed on the inside and outside of two pipes arranged with an annular space between the two pipes, through which annular space a refrigerant, such as freon, is circulated while water is allowed to run down the outside surface of the outer pipe and also down the inside surface of the inner pipe. These streams of water are chilled by the refrigerant in the annular space until an appropriate thickness of cylinders of ice has been formed on the outside and inside surfaces where the water had been running.