A device for unloading a container having a removal opening has a rotatably mounted supporting surface mounted to turn around a first turning axis, a rotatably mounted retaining device, and a synchronizing device. The unloading device causes a container on the supporting surface to tilt so that the removal opening of the tilted container points obliquely or vertically downwards. The retaining device prevents an article inside the tilted container from moving linearly through the removal opening. The retaining device is mounted to turn around a second turning axis. The synchronizing device is configured for synchronizing turning of the supporting surface around the first turning axis and the retaining device around the second turning axis. The synchronized turning of the supporting surface and retaining device causes the container standing on the supporting surface to tilt such that the removal opening of the tilted container points obliquely or vertically downwards.