The invention relates to a device (1) for separating a material mixture (2), in particular waste material, in particular plastic and/or bio-waste, comprising a treadmill (3), which has an adjustable inclination in particular, for transporting at least one part of the material mixture (2) in a transport direction (4). The material mixture (2) is deposited on the treadmill (3) substantially in an evenly distributed manner in particular in a transport width (5). The device also comprises a fall region (6) for generating a falling stream (7) of the material mixture (2) for the material mixture (2) transported on the treadmill (3) in a transport direction (4) at an interruption region (8) of the treadmill (3). In particular, the treadmill (3) has an adapted transport speed such that the material mixture falls substantially in a specified parabolic curve in the interruption region (8). The device also comprises an air flow means (9) for generating an air flow (10), in particular a directed air flow, in particular w
