To provide a compact label taking-off machine having high removing ratio, and a recycling recovery treatment system for a waste plastic container by utilizing the same.

The label taking-off machine has a function for separating label pieces from a mixture of waste plastic pieces broken into a flaky state and label pieces to recover waste plastic pieces and is equipped with a charging port (9) for a label-containing raw material, a housing (3) for receiving the mixture from the charging port and a recovery container (10) for recovering waste plastic pieces. A label separation mechanism (2), which comprises rotary plates (2a) and a plurality of suction hoppers (2b) opened to the outer peripheries of the peripheral housing wall surfaces of the rotary plates, is provided in the housing over at least one stage or a plurality of up and down stages.