Abstract: A prop for propping the lid of a trash bin in a partially open position includes a frame having an elongated slot. The prop is mounted on a trash bin by inserting the lid hinge rod of the bin through the slot. When mounted on a trash bin, the prop can be moved in a direction perpendicular to the axis of the lid hinge rod, the rod sliding laterally in the slot. The prop can thus be moved between a position in which it supports the lid in a partially open position and a position in which the lid can be swung fully open. When the prop is in the former position, two arms, one or both of which may be integral to the frame, extend generally perpendicularly away from the axis of the hinge rod. In this position, one arm contacts the rear wall of the bin and the other contacts the lid of the bin. When the prop is moved to the other position, one of the arms disengages the portion of the bin with which it was it contact. The lid can then be freely swung to any position.