To provide a working plyer for the segregation of waste materials such as a PET bottle, a glass bottle and a gas filling can.

In the base 10 of the plyer, front parts of left and right pinching parts 12, 14 are formed into almost wedged shapes which are gradually thinned toward front sides, and the left and right pinching parts 12, 14 are bent into inverted chevron shapes at the same angles from middle points of the pinching parts toward upper parts thereof. Tips of faces of the pinching parts 12, 14 which adjoin to each other at their front parts between the left and the right are formed into accurate angles with their one-side corners oriented obliquely upward. Erecting pieces 22, 24 are erectly formed upward along the edges inside of the middle points of the left and the right pinching parts 12, 14 which are bent into the inverted chevron shapes, and at one electing piece 22, there are arranged a cutter blade 32 for pulling and cutting a label or the like, a peel-off paddle 34 for peeling off the label, and an induction paddle 36.