A docking station capable of assembling a portable electronic device is provided. The portable electronic device has a display screen and a slot. The docking station includes a body and a pressing member. The body has a protrusion. The pressing member is movably arranged in the body, so as to be hidden in the body or moved out of the body. When the portable electronic device is locked with the protrusion through the slot, the pressing member is moved out of the body and presses against the portable electronic device along a pressing direction, so that the portable electronic device is fixed onto the body. The pressing direction is perpendicular to the display screen.