Abstract: A delivery robot includes: an inner box provided with a receiving space whose upper part is opened; a hinge bracket fixed to one side of the inner box; an actuator placed on one side of the inner box and configured to lift the rod up and down; a rail arranged vertically outside the inner box; a cover assembly partially connected to the rod, installed on the hinge bracket, and configured to rotate around a first axis according to a lifting operation of the rod to open an upper part of the inner box; a tray placed in a receiving space of the inner box; a lift wheel unit fixed to the tray and configured to move up and down along the rail; a first link installed on the lift wheel unit to rotate around the second axis; and a second link whose one side is connected to the first link to rotate around a third axis and whose other side is connected to the cover assembly to rotate around a fourth axis.